We'll use the campsite (see other threads re booking French campsites) just the other side of the autoroute, which is very handy for nipping up to the town. We'll have a car with us as well as multiple bikes.
Favourite shop there has to be the toy/juggling shop, and you have to keep an eye out to see how many aliens you can spot.
Oh and Montpellier - this time it's personal - the tramlines caught the front wheel of the tandem last time we were there, cue two riders bouncing along cobbles until we came to rest upon the feet a bouncer outside a club (it was about midnight, but we were sober).