Sorry for the delay! It's been mid 20's (C) here and decided to camp out last minute for a couple days
Still super happy with it - ran a little 700 watt heater on low as we were in the mountains and it was almost too much! I looked at mocking up my Dickinson 12000 heater, but not enough time this trip.
Bed frame pix using 1 5/8" unistrut:
The uprights are the shallower 13/16" unistrut. The bed is currently built with the deeper 1 5/8" square channel.
From the outside, the only addition was 3 bolts to hold the one side of the unistrut. As the aluminum studs in my trailer were U shaped with hollow side facing out, we put small 3" aluminum braces for the upper and lower carriage bolts. And siliconed them before installing. The middle carriage bolt goes thru a 1x3 aluminum box stud.


I tried the queen bed with only 2 horizontal supports, but it's much more solid with 3.

Angles at the tops of all 4 supports to allow a caribeaner thru to grab the eye bolt on the bedframe
You can also see we piggybacked on the holes that supported the door hinges. No extra holes to hold the back unistrut frames on


The dual hole supports are also at all 4 corners. I found a round-headed allen key bolt that just fit into the slot on the L brackets. All 4 corners key in when the bed is down and help lock everything into place.

To raise the bed, we hookup a micro traxion to all 4 corners and step-raise the bed 1/2 the distance at a time. Can be done with one person, but 2 is easier

After it's raised we lock the eyebolt to a caribeaner thru the top angle & it doesn't go anywhere!
It also makes it easy to adjust the height of the bed to whatever height along the way. I like my options
also - a quick photo from an earlier time with the bed all the way up
