I have the same problem, but both of my neighbors have powerful interests -- Washington, D.C. and "In Town". (I'm not begging for an IRS audit, nor having my lot bulldozed "in error").
You can
try the MPs, at (877) 642-9700, and leave an "Anonymous complaint". (They'll try to coax your anonymity from you -- be firm). Suggest that the MPs "lurk" -- they will need to witness
those offenses. Anticipate -- they'll need up to an hour to respond.
Meanwhile, I'd put three (or more) reflectors and one (each) bright orange flag on your boat lift, dock, and swim raft to try to keep something away that's
even worse : trial lawyers.