No- Most people who need the extra bed because some of the group won't sleep with others bring an air bed and the extra sheets and blankets from home. We bring an air mattress and pump, the bed linens and a lightweight mattress in a rolling duffle that we just include with the checked baggage. I have now got a new one that I take to our summer camp that has a metal frame that brings it up to regular bed height which works for me these days as getting up off a mattress on the floor has become increasingly difficult the last couple of years. I paid around $45 for it and may take it to WDW one of these trips if we need an extra bed.
Nope, you have to share beds or get a large enough villa for everyone to get their own bed if they don't want to share. Now if this is about squeezing in an extra guest....., read here: http://www.disboards.com/showthread.php?t=901569