we changed the floorplan of our trailer. the '64 overlander didn't come with a rear bed/side bath option, but its a more logical layout... so we stepped off into the unknown and changed it up. we used the layout of the current 25' Safari as a guide and layed everything out on grid paper. i won't lie to you... it wasn't easy, and it isn't for the faint of heart or the only somewhat handy person... but we're happy with the outcome.
for more info on what we did, you can check
here or
here.
good luck with whatever you decide to do!