I recently returned from a 7200 mile trip with my new to me toyota sequoia and '09 surveyor 235RKS. I thought the performance was quite impressive, I was able to accelerate on every hill or pass I was on except for two occasions (in the south yellowstone area at 9500+ ft. of elevation).
The lowest gear I hit was 3rd(3500-4000rpm), except for the two near Yellowstone. Doing 50mph, it called for second, complied and was revving near 5000rpm. I could stay at 50 mph in 3rd if I didn't care to accelerate (which was O.K. With me!).
I thought that fuel mileage was acceptable (compared to other members mileage - the higher the better IMHO!). The SUV read 10.5mpg (U.S.) and I got 10.67mpg measured.
64 gas receipts, a low of $2.96 a gallon (Claremore OK.) and a high of $4.49 a gallon south of yellowstone. That's leaving Canada out where we paid $4.97 a gallon returning!
I thought the SUV was nicely matched with the trailer, I was quite surprised at some hills in California and New Mexico. If I lived in these states I wouldn't want much more trailer or less SUV!
My trailer is approximately 4650 unloaded (yellow door sticker), at the scales during our trip I had 5380lb. for the trailer axles plus tongue weight of approximately 475lb-before the battery, tanks and stuff we drug along (guessing 800lb.). I do have the axle weights from my truck but only with the trailer on. The wife and kids can only take so much! LOL!
We had a great time with only a broken stove vent fan and belt that went bad on a trailer tire (swapped out with the spare and replaced one evening to pass some time... Just kidding!