While group camping we used my camp shower (one that heats up the water, we were using it for dishes) to give a friends toddler a little shower (no shower enclosure, he loved it and ended up clean in less than 10 minutes. I would recommend looking into a camp shower if the campgrounds you plan to visit don’t have shower facilities, or if you’d rather avoid the shower facilities with the children. I also agree with the “plenty of wipes” comment as well. Another important element is bug spray and sun block, you may want to try the bug spray and sunblock at home to make sure your children do not react negatively to either.