HELP! WHERE IS THE CLOSEST OPEN WATER BY LAX??

If anyone can help it’s you guys. I want to take the boat out this Sunday (Don’t care how cold it is, i need to run some STABIL through the engine and i might as well fish). And I told the WIFE that I have to have it in the river to run the STABIL through .Where is the closest ramp to open water? I lijve in Sparta and thought about going to either Genoa or Trempeleau? Any input would be awesome especially on that steep ramp at Genoa (is my truck going to run away on me, like two years ago???? Holy cow talk about pucker factor!! ) Any input would be awesome. Even if the WI River is open by Pettenwell, I just want to fish for some Sauger or Walleye. Thanks guys and Merry Christmas.