2newsaints,
All of my furkids are shorthaired, 2 danes and a dobie, so keeping them cool is alot easier than with a full coated dog like a Saint. I generally tell the campground owners that I am bring three large dogs, so they generally tuck us away somewhere, and often leave the sites on either side empty--their decision, not my request, so I don't have to pay extra. Since we are usually in the back of beyond, if there is a river or stream we are close to it and we take the brats swimming at least once a day. Besides that they always have access to fresh water, and love to horn in on the enevitable frequent human waterfights that break out with alarming regularity. Be aware though, that most of the campgrounds we have been in require a leash at all times, and dogs over 25 lbs are not allowed to be at the campsite unattended, even if confined to your camper, probably because of the soft sided canvas. When we had plans that could not include the brats (horseback riding) we found a local doggy daycare for that time. They did go canoeing with us and absolutely LOVED it.
We also keep a couple of box fans running outside during the day in the worst of the heat, and move them inside at night when it cools off. We don't have air either, and really don't miss it all that much.
Stella