4400 lbs dry will be around 5400 lbs loaded. Not sure how big your family is. I tow slightly less than that with my 7000 lb rated Mountaineer. But the Explorer that it's based on was only rated that high thru 2010. If you're looking used, 2009-2010 Explorer I would highly recommend. 2011 Explorer went crossover (5000 lbs MAX rating).
But if you have family of 6 or more, I'd look to the Expedition/Suburbon size. And if you're thinking new, the 2015 comes standard with the Ecoboost, and will likely have the same 9000 lbs rating as the current 5.4L V8.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller