I'm also trying to decide between the 16TBS and the 21 RBS. I kind of liked the twin bed setup and the shorter length of the 16 but like everyone else I wondered if I would end up wishing I had the extra room at some point. I called Camplite to discuss it and they said it wouldn't be a problem to put the twin bed/ king bed unit in the 21' trailer and that sounds like a great solution to me. You would gain extra storage; the 16TBS only has storage under one bed since the water heater is under the other but on the 21' you would have two large storage bins. And the idea of a 7' wide bed vs a 5' wide bed sounds like a winner to me! The big problem might be finding sheets to fit and trying to keep them on the mattress.
You would lose the two outlets from the "night stands" but they said the outlets could be move where ever you wanted them, except they can't put them on an exterior wall.
You would lose the two outlets from the "night stands" but they said the outlets could be move where ever you wanted them, except they can't put them on an exterior wall.