Be aware the Frankenjura may not be as good as it's reputation suggests. I have talked to people who love it but I thought it was a poxy shitty painful crag that was a pretty bloody average place to climb. It's basically really short uninspiring climbing. The worst part about it though is the shitty painful pockets which pretty much make up most holds in the area. They feel like god designed them to hurt climbers fingers.
I say again some people disagree with me but I was really disappointed with the Frankenjura.
On a more positive note I loved Gorge du Tarn and Rodella, they are both amazing!