I've been waiting
for someone to answer your query. I am interested in the same question since a ton of hotel rooms and BJ tables are now history for the forseeable future. I may be going to Tunica late in October, and I've been trying to catch up with a couple of friends from over that way, but I have not been able to yet and have not heard one thing about crowds at all...
If you haven't heard by the time I go, I'll report back here. If I manage to catch some friends with info, I'll also post it here. I suspect the crowds are going to be up, although worst case would just be full hotels, which is probably common on weekends anyway...