Hi M C,
I've book-marked your build journal so I can follow along on your
progress. I like the wide "V" bottom of boat trailers for just
the purpose you're using it for. That faux metal log siding is
quite novel and should work splendidly for your purpose.
I also like the Murphy bed you have planned. Where did you
get the inspiration for it ? I first saw one like that in this thread:
http://tnttt.com/viewtopic.php?f=5&t=26930And this associated blog:
http://littlegemrenovate.blogspot.com/The whole blog is interesting. Pics regarding the Murphy bed are
on these posting dates:
12-19-10
11-08-10
10-16-10
10-09-10
11-21-08
I find beds made out of dinette/gaucho cushion sections to be annoying.
I don't like the seams the temporary cushion "joining" makes under you and
invariably they'll separate, especially if they are in a longitudinal
orientation [Voice of experience on that.] . The Murphy bed is a perfect solution for
having a Real bed all ready for use and not requiring the perpetual make-up
and take-down of the 'usual solution'.
Forum member emiller has a restored tandem Covered Wagon with a rear drop floor that
has canvas side enclosures for it in the down position. Here's a link to his thread on it:
http://tnttt.com/viewtopic.php?f=53&t=41752http://oldietrailer.shutterfly.com/There's an old New Zealand caravan brand that had it too:

A few years ago I came across a couple pics of a Czech TTT from the
1970s that had its entire walkway floor drop down in a similar fashion, but I can't
locate the pics at the moment. So the idea has been used world-wide it seems.
Good luck on your build, I'll keep watching for your posts on it in your build thread.
Cheers,
Norm/mezmo
If you have a house - you have a hobby.