i prefer Bittrex for this
I also think bittrex would be better choice.
The last time on BTC cash fork, I remember bittrex allowed to trade BCH in just a couple of days after the fork.
I had my Bitcoin on Bittrex during the Bitcoin Cash fork and received the equivalent amount of Bitcoin Cash when it forked.
You could trade the Bitcoin Cash immediately you received it (no two day wait), I did this even though it said the wallet was locked.
The trick is to just go directly to the trading page by typing in its URL;
e.g.
https://bittrex.com/Market/Index?MarketName=BTC-BCCI'm sure you could do this with Bitcoin Gold, if Bittrex supports it.