We took our labrador to France for a week for the first time last August. I found France to be incredibly dog friendly. More so than UK in terms of accommodation. There were so many other people with dogs too and it was a nice way to get chatting to people. We were in the Dordogne camping for 3 nights, b and b, then a hotel in sarlat and then in the Lot region in an auberge. All the restaurants we tried were happy with dog inside and out. She came with us canoeing, hiking and visiting some caves.
Our only gripe was the cost of the vets to administer the wormer so if you can research ahead of time and find somewhere cheaper it might be worthwhile.