Waters should be fine. The rain just barely showed a jump on the river gauge this week. They're dredging Zone 2 during the week causing chocolate milk downstream. Even that just messed up sight fishing only. The bite has been fine. You'll be fine
Stop by Tim's Fly Shop for up to date info. I'd suggest the State access just east of the park on hwy F. The last flood took out most of the access roads so the MDC access best bet. Park in lot and walk down to River.
I've had my best luck after the sun warms the water surface a little and you see a hatch swarming. Cracklebacks in blue dun hackle works for me but other friends have done better with whites and cream colored parachute pattern
You should be alright as long as you are not dumping beer cans, trash, or tearing up the place. ATV, keg parties, and trash dumping generally spoil access for all of us. If posted, definitely ask first. If I'm thinking of the right place, it is gated and padlocked now anyway.