In reply to matus:
I've been there many times - usually over Easter. The guidelines I have are that if it's an early Easter, it will be a bit cold - if it's a late Easter - it will be a bit warm - overall - I think Easter is an excellent time of year to go there. (Usual caveat here about extremes of weather).
The campsite in the village itself (Princes d'Orange) is excellent - albeit a little on the pricey side. They have a swimming pool in the campsite as well as the municipal one in the village - neither will be open at Easter.
You should also be able to find a gite in the village or slightly further afield up or down the valley.
An attraction for me at the Princes d'Orange camping is that you walk from the campsite to the climbing. It also gives you easy access to the village bar & restaurant(s).
The village has a quite adequate supermarket for most needs (fresh fruit, veg & bread). Bigger soopies are further afield & require driving to.
The climbing at most sectors is semi-child friendly - easy enough to reach, but with some potential for trips & stumbles on short scrambles. I don't think you would let a toddler run loose at the base of most sectors. Some sectors also carry a risk of stone-fall - especially the multi-pitch areas - with some stone-fall triggered by people descending from the longer routes. There are usually plenty of kids at the crags - some rising superstars climbing completely independently & some who are dragged along by their parents.
You can normally choose to climb either in the sun or out of it - if you're willing to adjust your schedule a little - ie different sectors have different aspects - for most of the climbing I'm interested in there - the routes are going into the shade after midday.
I hope this helps,
Keefe