For planning purposes, here is my map of the most famous FKKs and a few brothels. These are the clubs you should consider visiting first.
Famous FKKs Map
You don't need a car to visit Artemis in Berlin or Palace or Mainhatten in Frankfurt. You can reach some other clubs like Oase, Sharks and Samya by public transport but getting to those places is a bit more of a challenge. It's easier if you have a car.
So before you plan a trip to Germany you need to decide whether you will rent a car or not. Germany is a great country for driving but finding your way to the clubs outside the city centers can be challenging. Most are often the beaten path, but worth it once you get there. If you rent a car, I would advise bringing a GPS with Europe maps preloaded.
Thanks Capt Renault and Rumpleforeskin.
The FKK club price admissions include the beer, buffet AND a 30 minute session..right?. What if you wanted to hump again after a couple of hours?. Pay extra for that ..another fee ?. I have not decided whether its going to be Berlin or Frankfurt is where I will be be heading first (I only have a week to party there). Might go check out Berlin first and ARTEMIS and then take the eurail or MegaBus to Frankfurt for a couple of days. Thanks for the valuable info!. I think I will be happy to check out 2 clubs in Frankfurt reachable easily by public transport. Cheers!