Bittrex have released greater confirmation that they will support the Bitcoin Cash Hard Fork, reiterating that they will "take all reasonable steps to ensure that customer funds can be preserved on both chains".
This said, there is still no confirmation that they will have a tradable market with the statement also saying; "There is no guarantee that any markets will open to allow BCC assets to be tradable on Bittrex exchange".
You can see the full release here:
https://support.bittrex.com/hc/en-us/articles/115000808991
Does this change anyone's mind? Planning to keep some bitcoin on the exchange?