In reply to BenTiffin: Like everyone before you I will give you the heat warning. There is a local guide available from the office de tourisme which is at the bottom of the hill accross the road from intermarche.
a lot of fantastic bolted lines. the quieter crags are probably best to avoid polish in the lower grades and a car is kind of a must.
70mtr rope if you dont want to miss anyhting but you cna get away with a 50-60. would definatly recomend doing "day 1" down the river in a little boat takes you under the arc and is about a 6-7km strech.
there is some bouldering at a place called casteljeu which looks fantastic unfortunatly i havent made it out there yet. there is also a good online guide to the blocs at casteljeu its a blog that is easy to google but its blocked on my web here.
have a good time and bring some sun cream.