As my kids got older ("quasi-adults") and started bringing friends and/or significant others, we outgrew the ability to sleep all in the RV. So we picked up a fairly large tent from Kmart for $150. It sleeps 8, and while it isn't an instant pop up design, it only takes about 20 minutes to set up and take down. It is a cheap lightweight tent, not something I would purchase for dedicated "tent camping", but for use as an additional bedroom and changing room (it is tall enough to stand in), it's ideal. And even though it is not heavy duty, is has survived a couple of rainy nights without issues.