Rebecca, I can't speak for any other models, but Trilliums are fine for a 6' person. The beds are 6'-2", the roof is about the same, (depends where you stand). A/C is a problem with most small trailers. The roof is not designed to support the weight
. This leaves window installed, or under a bench. Both of those are a compromise. In a window is typically installed at your camp site, (though there are permanent installs). Under a bench cools your floor, but not so much the rest of the trailer.
It might help to define your price range.