I dehydrated many apples for our trip a few years back. It took a lot of apples and time!! Here are some tips:
--start several weeks before your trip
--use hard apples (Gala are my favorite)
--buy an apple peeler, corer, slicer (mine is from pampered chef) so all of the slices are uniform and dry at the same time
--have the kids help--my kids get all excited to help--we count the days down till the trip by doing the apples
I am going to try to dehydrate cherries when they get into season. I love cherries, so I hope it works!!