Upcoming Tournament

In two weeks I have a tournament on a local lake, around 50 boats. two weeks ago I was on fish, had a spot that I found that was good for 15 lbs which would be what I needed for a good finish. The spot was off the main river channel, went from 30' to 16' up to 1-4' at the top, the hump was half an acre. When I went there this weekend water temperature was up to 82 compared to 75 when I was catching them and I couldn't get a fish. I waited until 2 pm to check out the spot so the water had warmed up a bit since then. I'll have to go out there this weekend and hit the spot early morning while they're shallow and see if they're still using this hump. If they aren't could they be using the deeper water and next to it in thechannel or would they have moved completely ouyt of the area? Also should I worry about hooking fish 7 days before the tournament day?