Most kids just think of it as an interesting sprinkler. Sponge baths can work quite well, especially if you are camping in cold weather. My son stubbornly refused to use the potty unless reminded every hour to do so. After he saw his father urinate on a tree a few times - all of our problems were over. He now stands up to potty and tells us when he needs to go.
Camping trips are convenient for potty training.
There are no 'accidents' on your rug or your furniture and a potty chair can simply be set up anywhere in your camp site so your child won't feel isolated while trying to go. You will have more time with your child when camping, and this can be the most help of all.