Fishing Creeks

B1 is our launch spot and the creek to the left is what i have questions about.

We have hit it recently a couple of times with not 1 single fish.However, we have not been since the temps have been consistently in the 80's and low 60's at night. and this week we have had highs in the high 80's to 91 and lows at 66 on average so i know the water has to be a little warmer. My question is, with these temps, when would fish be apt to move into the creek? Is there any deciding factor that would make them get up in the creek?

The creek is a couple miles long and 8-10 ft deep with TONS of cover, mainly submerged trees and some shallower spots with weeds. I mean trolling through it at first glance it looks like one of those spots that you dream about. Just amazing. Is it the wrong time of year or what? We plan on going sunday and checking it out.