After two years of living with Covid-19, travelers are redoing big vacation plans.

But not all types of travel may be available this year, travel professionals said.

Indeed, many people have postponed more ambitious holidays during the pandemic – in some cases two years in a row – leaving little room for new bookings this year.

Nearly half of those whose vacations were canceled in 2020 and 2021 plan to take them this year, according to a survey by travel insurance company Berkshire Hathaway Travel Protection. Only 5.5% are pushing those plans to next year, and less than 4% plan to cancel altogether, according to the survey of more than 1,500 travellers.

Also, people are taking longer trips and booking them further in advance. Some fall and winter vacations are already starting to sell out, said Lee Thompson, co-founder of adventure travel company Flash Pack.

But some trips can sell out long before, like these four types of vacations that travel insiders say fill up quickly for the summer.

Booking an African safari 12 to 18 months in advance could be the new normal, said Shannon Kircher, founder of US-based travel company Compass & Vine.

Many travelers dream of going on a safari, but don’t pull the trigger because of the amount of planning and money that goes into it, Kircher said.

However, the pandemic has “challenged our ideas of pushing back meaningful travel,” she said. Plus, more people have the time and money to travel now, due to canceled trips over the past two years, she said.

For travelers picking up the idea of ​​international travel during the pandemic, the privacy and outdoor nature of safaris is appealing, she said.

“Safaris are inherently socially distant – you’re around more animals than humans in general,” she said.

Travelers choose to visit East Africa from June to October because the period coincides with the great wildebeest migration, Kircher said, and many extend their trip to enjoy a gorilla trekking experience or getaway to the beach after the safari.

Several locations in Hawaii may not have vacancies this summer, said Zander Buteux of home rental company VacationRenter.

“If you’re waiting until June to book travel in June, you’ll have little choice,” he said. “This is especially true for key cities on each island such as Honolulu, Lahaina and Kihei.”

Two areas that still have good availability are O’ahu and Hanalei, Buteux said, although he doesn’t expect things to stay that way.

Travel to Hawaii has increased over the past eight months, Buteux said. Business should pick up even more — as well as prices — once the state lifts many of its pandemic travel restrictions this month, he said. Starting March 26, visitors from the continental United States will no longer be required to show their Covid-19 vaccination status or a negative pre-travel Covid-19 test to enter.

Summer isn’t the only time of year to book up quickly, said Phil Jones, CEO of luxury vacation home Pure Kauai. The Easter and Christmas periods are also filling up, he said.

Like Buteux, he said: Once “quarantine restrictions are lifted, we expect bookings to increase”.

Americans still hesitant to travel abroad are booking luxury off-the-grid vacation spots in the country, Kircher said.

Some well-known ranches are booked more than a year in advance, she said.

Rock Creek Ranch in Montana is mostly booked through February 2023, and almost all weekend slots at Wyoming’s Brush Creek Ranch are full, according to their online reservation systems.

“For most people, the privacy and disconnected nature of dude ranches is appealing,” Kircher said. Activities such as horseback riding, fly fishing and rafting are outdoors and naturally socially distanced.

What’s more, many of their needs are also catered for by visitors, as “most high-end lodges are truly all-inclusive, which means food, drink and luxury amenities are included,” said she declared.

Booking summer yachts at the last minute is a thing of the past, said Tim Geisler, founder of Grenada-based sailing company Nautilus Sailing.

Many destinations, especially in the Mediterranean, are selling out well in advance, he said.

Greece, Spain and the French island of Corsica are currently the most popular charter destinations in the Mediterranean, he said.

“We’re noticing things are starting to get back to almost pre-pandemic levels,” Geisler said, adding that “80% of our charters are already booked in Spain.”

Summer Mediterranean yachting trips are popular among Americans because they tend to avoid the Caribbean during this time, as it coincides with the region’s hurricane season, he said.

The company is seeing an increase in reservations and demand from travelers who want to book trips nine to 12 months in advance, which is limiting inventory down the line, he said.

“The later you book, the less choice you will have when it comes to yacht size, configuration and location, so it is best to book [at least] six months in advance,” he said.

The company recently started operating in Croatia, Geisler said, adding that there are yachts available there for the summer, but probably not for long.

The global yacht charter market, which was valued at $16.9 billion in 2021, is expected to reach $26.5 billion by 2027, with Europe being the top destination of choice during the summer months , according to market research firm Mordor Intelligence.

– CNBC’s Monica Pitrelli contributed to this report.