I am currently mining ZCL myself, also to capitalize on the fork. Also I think BTCP is a great community project and they aren't just trying to push it out. Seems like they are taking there time to get it right which I think is smart! anyway since you can't get on Bittrex ATM I would use the wallet you are until the new ZClassic Electrum wallet is released next week. Then transfer all of your coins there and mine directly to it. It is always worth having a wallet. (I do mine to the exchange at times as well haha) This way you will get your BTCP at least when they do the fork. Keep checking in on Bittrex. They might start accepting new accounts soon.. if not maybe somebody can help you out that you trust of course.