aquaforce

We are looking at going up to Percy Priest in Nashville and wondered how the access is getting into some of the marinas there. I am 70 feet in tow with a 42 foot craft to launch and slip. The marinas I thought to check are: Elm Hill, Four Corners, Fate Sanders and Nashville Shores. Anyone here familiar with these places and can speak to getting in/out and launching at them the lake water depth etc, and the amenities?
TIA