Starting at the dam is a good idea, it's about 7-8 miles from there to the middle of warren and theres is alot of good musky water between. And from there down is some great musky fishing. I have no idea how well fishing from a drift boat will be as I've never used one myself ever. But you will cover some good water and have some shots at good fish. If you guys want some one to hook up with I'd be more than happy to hit the water with you.