Just a word of caution re. the camping advice contained herewith.
The ready-erected tents mentioned are provided by holiday package companies such as Eurocamp, Keycamp, etc. They are magnificent well-appointed tents but are enormously expensive and are pitched very close together - one good fart has the whole row awake.
The same companies also provide mobile homes - very good and very expensive.
French campsites are on the whole infinitely better-run than UK ones. Provided you don't have a large site that has chosen to cater to UK large-scale, you can generally guarantee quiet after 11.00 pm - kids might be roaring about at 10.59 but at 11, shtum.
Most French campsites are divided up into emplacements - trees and shrubs denoting your pitch - which removes the god-awful British practice of sending out the kids to kick footballs round someone else's tent.
Many French sites let out their own apartments and mobile homes directly, and while these are dear they are much cheaper than going thru Eurocamp etc.
An approach I have often used is to get the brochures from a travel agent, look at a site I fancy then google them to see if they have their own lettings, then contact the site directly.
Many of the large glitzy sites now seem to be Dutch-owned, and often don't accept credit cards (continued)