A 3 acre lake I fish has absolutely zero bottom structure. It does have a decent amount of shoreline deadfalls but the water is fairly shallow along the shore. The lake depths vary from mostly 11 feet up to 18 feet - all with very gradual contours. The crappie seem to have pulled back off the shore structure by late Spring and are seemingly scattered without any mid-lake structure to suspend on.

I'd like to drop a couple fish structures but can only access this lake with a canoe. The best I can think of is an old christmas tree with a cinderblock foot - I can get that into the canoe and over the side (hopefully!). I like the bamboo stuff but doesn't seem feasible given my small watercraft. Any other cheap, natural ideas?

I don't have a GPS setup and think i will have a hard time getting back on the structure to fish it. I do have a portable depthfinder in the boat but worry I'll be paddling back and forth back and forth trying to find it on future trips. I don't want to mark it with a buoy as other fishermen will be all over it. I guess I can try to triangulate from shore but that gets hard once out on the water. Any other ideas to help get back on small pieces of structure?

Thanks