Ryan:
I live in the Cascades near there. Algonquin is very grassy this time of year (you probably want to try to fish the surface to keep your fly/lure out of the grass. There is not alot of structure - the bottom and depth seems very consistent anywhere you wade from the boat ramp. - you will be wading in thick clumps of tall grass. I have done it. if you are at the boat ramp facing the river and walk to the right along the bank of the river for 1/2 a mile you will hit Sugarland run - a creek that flows into the Potomac. The mouth of Sugarland has some carp and there are often largemouth in Sugarland run. Many places are steep drop off so it is tough to wade Sugarland run.
At the mouth of Sugarland, there is some skinny water in the river itself. Not sure if you have to cross deep water to get to it. A lot of spin and bait fisherman fish from the bank - tough to do with a fly rod.
Good luck,
Charlie
Has anyone waded this area ...... any recommendations would be appreciated. I've got a few hours to kill this afternoon/evening and will be in that area.