I am a Mixed martial artist and I take only wado-ryu but, we train HARD. Also I have a cousin who is a great grappler (he takes BJJ). I go down there and fight them all the time. Its a win win situation, I get better at grappling by them teaing me and fighting me. They get better at striking by me helping them. What Im saying is... SOME karate schools would be great, but to be a mixed martial artist you need to find someone to teach you some more ground fighting... even personally would work. Im sure from your wrestling experience you would pick up on grappling very fast. My opinion is to try the karate place for a while and if you dont like it... leave