Jim
Ringleader
Whatever dog you choose make sure that it can actually travel with you.
There are plenty of sites now that have restriction on which dogs they allow on site. Some dont allow German Shepherds and Labradors, some dont allow staffys.
Consider where the dog will sleep and how much room they will have to move around. Perhaps a smaller dog like a bichon frise that doesnt molt may be more suitable for motorhome travel if you are touring long term. Hairs get everywhere
I've seen Bull Terrier restrictions on sites n France, but never GSD or Labrador.