where are you thinkning as it is a longe range, been to
Basque country/Biarittz, good mixture of stuff perhaps we did not find the best trails but now has a company think they will be featured in the singletrack next edition. Good moutains with ability to ride to beach and swim, when we did this trip family was young
Luchon area, can highly recommend AQR and there are some great road climbs as well. Going 2010 for a week, yeah. High mountains lush singletrack good maps and lift if required
Pryenees orientales rode this prior to the company altitude adventures opened up, stunning area and great singletrack.
Prades area fab fab fab, last big moutain with great trails and friendly local club see vtt prades or prades 66 for trails.
We tend to take a map and ride where we think is best so a bit hit and miss, used AQR for guiding tremendous peopel, quality and guiding.
Other areas Ax le therme and Foix.
Personally the pryenees are better than the alps, i just like the vibe more.
Enjoy