M_Boats: Towing with the extension out

I am considering to just tow my M17 with the extension out on the trailer. The extension on my Pacific trail is not all that long, while extended there is about 4-5 feet of overlap with two pins holding it.  I tow it about 15 miles back and forth to the lake, no highway but speeds up to 55mph. I know there are ways to set it up to easily extended it without taking it off the hitch but I have not gotten around to that yet.  Does anyone think this would be unsafe or not recommended for some reason? Thanks, Ron McNeil Jackpot