How does one fish a steep, weedy dropoff from shore?

[MuskieBait]

I want to see how the Polaris floats work next time. They can suit some of my fishing situations...but I may be fishing deeper than 20 feet (maybe even as deep as 100+ feet). Think it'll work that deep?

These floats are really attractive since I much prefer to carp fish with float rigs...but fishing a float rig in 6+ feet of water presents casting issues unless you use a long rod.