Travel Trailer Towing with 2007 Expedition
I also have a 2007 Eddie Bauer Expedition with the same tow package as you do. I have first hand experience in towing a couple of different sized Travel Trailers. The first Travel Trailer I owned and towed with my Expedition was a 26' Rockwood that had a GVWR of around 6500 lbs. I used an Equalizer Weight Distributing/Anti-Sway Hitch. The hitch is an absolute necessity when towing with this vehicle. With the weight distributing hitch I had minor sagging in the back of the vehicle.
I recently bought a Starcraft Travelstar 292RESA. This trailer is much nicer, but it is also quite a bit heavier. The GVWR is 8550 lbs, and I know that I have had it packed to it's limits. I recently took my family on a trip from Phoenix, AZ to Seattle, WA. The Expedition had more sagging with this trailer than it did with the lighter one, so I will probably be posting a question about resolving this issue....I am open for any ideas. I didn't have any issues with the Expedition pulling that heavy of a trailer, but she definitely knew that she was pulling something heavy, especially going through the mountain passes (Tehachapi, Shasta, Siskyous and Grants Pass). A couple of key things I have learned is that you need to watch your speed (CA and OR Speed Limits are 55 mph when towing anyways). Inflate your rear tires to 50 PSI or the safe max limit that is stamped on your tire. This will help to reduce sway. I ran in to some nasty winds in California, pretty much from Bakersfield to Redding, CA. The worst areas were around Tehachapi pass and Sacramento. There was some serious white-knuckle driving going on. The gas mileage was terrible, but what do expect when towing 4 tons? I just kept on trucking at 55 mph and all went well. The trailer brakes were a lifesaver going through the mountain passes.
Just remember to watch your speed, enjoy your trip and most of all...have fun! Our family loves to go camping in the RV, and the Expedition has proven to be a good tow vehicle.