I guess my camaraderie on an Alaska trip comes from spending an hour alone with a museum docent in Fairbanks who was a bush pilot before retiring, two Germans at an overlook of the Teslin River bridge headed for Deadhorse on their BMWs, a halibut fishing guide at Kasilof who explained how halibut feed, a lowboy trucker who stopped to repair my two flat truck tires on the Top of the World Highway, and a van driver bringing my wife and I back to Kenny Lake after our Kennecott tour (everyone else on the morning van flew back) who stopped to let us photograph beavers in a pond, then invited us to have dinner at his cabin with no running water.
My experience has been that meeting locals and visitors from around the world is more gratifying than being with the same group of acquaintances day after day.