The first post states “anti clockwise” not clockwise. For a first trip a very long journey is planned and probably a lot further than readers of this topic might have originally envisaged (certainly I did) circumnavigating the whole of France covering 2000 miles or more.
Definitely a lot easier to do in a motorhome than the former caravan. It will be a lot easier to park up in September. Virtually impossible in August along the coast.
It will definitely be worthwhile obtaining an ACSI card. Many of the coastal aires on the med, if not all, do charge, especially near beaches you are planning to visit. What we find is that off peak with an ACSI card it can almost be as cheap to stay on a site with its conveniences and we do notice motorhomers moving from aires to low cost sites once September arrives. Daily aire prices remain static regardless of the time of year. Campsite prices fall significantly by over 50% with an ACSI card once September arrives. Aires can be €10 a night or more when low cost campsites are available for €12 or €14 a night with ACSI and you then get hook up electric which most aires do not provide. Some even give free days for stays of a week or more bringing the daily cost down further. There are one or two beaches where motorhomes can drive onto along the med but not many. There is wildcamping along the med but away from beaches and inland. The police do regular patrols and will move motorhomes on if not parked in an official area near beaches.
Plenty of wild camping along the west coast near beaches, and southern Brittany. And the police in these areas generally show little concern.
For a trip of 1 month you will need to consider your gas situation. You cannot get calor in France and French gas bottles require a different regulator. If you have refillable gas bottles no problem making sure you have the correct adapter. If you have exchange bottles then you may need to plan for calor gas bottle storage when you substitute these for the French equivalent. You will use significantly more gas in a motorhome than in a caravan. We can get by with 2x6kg calor gas bottles in a caravan for 2 to 3 months in France as we are on hook up and have an electric hob ring and cooker/grill, electric hot water and heating.
If wild camping in a motorhome you will be running all the major cooking, heating and chilling items on gas and you will use maybe 12kg of gas in 2-3 weeks or even less depending on how much heating and cooking you do. Something to bear in mind.