We do plan to get another quad (eventually). For now, we're going to use the extra deck for the girls' bikes and other storage tubs (keeping it lightweight). We also thought using the deck sort of like a patio, putting a canopy over it.
You have a very good point about the length allowed at some of the campgrounds. I think 32' is the max for some. However, we plan to head out on our own while staying on pretty good roads. I'm glad you mentioned the off-road because we now know not to push it.
Another question, we plan to tow with our 2007 Chevy Avalanche (4WD, 5.3, 4.10 ratio). The tow weight will be no problem, just a little concerned about our wheelbase vs the length of the trailer. Technically, the trailer is 23' feet long so it should be fine, right?
Really appreciate your feedback!