I wouldn't worry about this:
First, she has no power at all yet, really. The election results are such a mess that it will take weeks/months to sort out a solution and whatever emerges will be some kind of coalition. Who even knows to what extent, if any, Merkel will be involved in such a coalition.
Secondly, if any politician, conservative or otherwise, were to tamper with the FKK's existence, he/she/it would enjoy a short political carreer, I bet. So popular are these clubs with the average voting German man...
Chill out and don't worry.