New to Camervan/Motorhome travel

My other-half and me are considering taking a trip around Normandy and Brittany next year for a few weeks with our 2 dogs.

We've never done anything like this before, and before we make any decisions, I'd love to research everything!! From RV hire, to roads in the areas/campsite rules/things we might not no, as well as obviously bringing our dogs with us. We're total novices so i want to learn all I can to see if it's right for us!

Does anyone have any good sites we should look up or places I should look to for info? We are also not against buying a second hand camper as opposed to renting (if we can justify the investment).