i know it will have to be at an angle and i will need gojaks to position the dual axle trailer in there but i was hoping some guys that are storing theirs in a similar garage would specify which boats would actually fit.
Years ago I had this same question. If I recall, the math to measure the diagonal of a square is one side X 1.413. So your 18 ft short side is 25.4 diagonal. That's the length you have to work with.
If you google "skeeter garage"' the first image returned is my old 05 (new at the time) ZX250 in my 19 ft garage. That's a 21 ft boat with a 250 and 12 inch jack plate. If you watched me put it in there you would swear it would never fit until the very last shove that got it at the correct angle
Here is the old post with picture still attachedhttp://texasfishingforum.com/forums/ubbthreads.php/topics/2322507/Garage_length_vs_boat_length