Nice, thanks for the reply. I was thinking 8x18 or 20 depending on the trailer I find.
One more - did the skids remain open at the top or was there a top to them before the floor? Also, how did you attach your floor framing to the permanent skids?
Have to ping you if we make a trip that way this season (we've got a Denali highway trip in march, but that's rising and hopefully caribou...no fishing plans made yet!)