Run your crankcase vent hose from out of the engine and down.
some people run it up to the top of the cage so any moister vapor
leaving the engine will cool into water droplets, and unless your
engine has excessive crankcase pressure will run right back
into the crank case. when you run in swamps, marshes, lakes,
and rivers the humidity is always high, and your going to have
some water vapor inside your engine reroute your blowby hose
and change your oil on a regular basis you'll be ok.