Hi Fisher
Since you want permanent beds, I vote for the first design with a couple
of tweeks.
I'd make the top bunk hinge at the rear and just lift up from the front to
provide some headroom for someone lounging on the bottom bed during
those rainy days and such.
I'd also make a sliding or flip leaf on the table, working off the narrow
end, to double its size in case you want or need more counter/table space
at times.
Also, I'd make sure the Porta-Pottie room actually has enough shoulder
and seat room to be used by real dimensioned [your family's] people. You
could also make a half-closet that'd hang over the P-P when it's not in
use, and then slide out over the small dinette bench when the P-P is
in use and at night-time. Why waste the volume above the P-P? - This
is assuming you require the separate cubicle for the P-P. Also, you could
make a small seat height hassock with either a lift top or a couple of
drawers. Use a couple of small straight casters at its 'rear'end and
regular 'feet' at its front. The storage hassock could sit in the space in
front of the P-P when it's not in use for additional
storage and be another seat that could slide under the end of the table at
night. And, make 3-4 slide out drawers sized to fit your barn door
opening and storage bins/containers/duffles etc.sizes for
under the bottom bed that could accept various plastic bins or plywood
dividers to organize items. If you could make floor mounted rollers at the
rear opening for each of the large drawers, with side guides for each
drawer, you wouldn't need to worry about drawer slides - and put a small
straight caster on each side of the inner end of the large drawers to
handle that end of them.
Just suggestions for consideration.
Cheers,
Norm/mezmo