Tauck plans to fully restart its US trips by July 1 after suspending tours and cruises a year ago due to the pandemic.
The company hopes to provide an update on selected international itineraries in the coming weeks.
The operator made an initial return in January with Yellowstone Park winter tours followed by the relaunch of other itineraries.
The resumption announcement came as a survey of more than 5,000 guests booked to travel with Tauck from now until September revealed that 95% have already been vaccinated, and another 2% have their vaccinations scheduled.
And while a small proportion remain undecided, the majority – 88% – are looking forward to taking their upcoming trip as planned.
Health and safety protocols on 2021 itineraries will include the mandatory use of masks, social distancing wherever possible, and enhanced cleaning and disinfection procedures.
Tauck requires travellers to confirm that they have either been vaccinated against Covid-19 or passed a PCR Covid-19 test within five days of departure, that they are free of virus-related symptoms and that they have not been in close contact with anyone diagnosed with Covid-19.
The ability and willingness to travel shown by Tauck holidaymakers are reflected in strong booking levels for its US tours, according to the company.
Chief executive Dan Mahar said the success of the winter tours was a key factor in the planned resumption of trips in the US this summer.
“Guests told us they loved their tours, and their positive feedback proved conclusively that we can deliver a true Tauck-level experience while still following all of the appropriate health and safety protocols,” he said.