What do you use for local travel once camped up?

I have used folding bikes for years, I purposely seek out campgrounds that are next to a rail trail. Currently I have full size bikes that fit inside the truck topper and kept in place with my custom built rack. The folding bikes perform well on good trails, I just need more gears as I age. Not a fan, but the Camping World folders work reasonably well, my only complaint is the tire size is impossible to find should you need replacement.