For your limited tow capacity on the Lincoln, (remember you have to figure in your stuff and your family vs payload), and your budget, take a look at this used ATC. I saw it awhile back and though it looked really nice for the age. All Aluminum, you could get creative with the interior layout (sleeping), and should still have some garage area left for tables.
ATC Toy Hauler 2006
1995 Ford E-150 Club Wagon Chateau Van
2012 Cargo Trailer Conversion Camper/Hauler