Do a little search, (upper left corner) for this subject. Much has been posted before. We have always traveled with 2-3 very large dogs. No problem finding campgrounds.
One thing I will suggest: If you have misbehaved, (running off) dogs at home-RVing with them will not make things better. Get you and your dogs into a good obedience class. Dogs need to be well-trained and socialized.
Many people are able to secure their well-trained dogs in a crate, with proper environmental controls, (AC or furnace), while they go to the market. It is unacceptable to leave yapping dogs unattended in an RV, never leave an unattended dog outside, either.
Dogs must be under control. Obedient, quiet and friendly.