Don't want to set a speed record but I want to move along at least 28 to 32 mph while fully loaded. What size motor would push my sea ark 2072 tiller style at said speeds? Considering either a 70hp or 90hp yamaha. Note the f70 is 250lbs and the f90 is 350lbs. My regular load would be myself the dog decoys 1 other guy and a 240lb permanent blind I'm going to build for it.