Does this mattress fit long-bed (6ft) trucks as well?
Technically, yes. With the Tailgate Buddies, this mattress becomes 6'7" long. However, the fit will not be perfect.
Does the tailgate need to be open or closed for the mattress to fit?
The mattress will fit in the truck bed with the tailgate up or down! If you need more leg room, open the tailgate and use the Tailgate Buddies to lengthen the mattress.
Do you sell a single-sided version?
No. Every Luno Air Mattress consists of two sides that are connected in the middle. However, each side has a separate inflation valve, so you can inflate a single side and fold the other side beneath it.