I see you're in San Fran. Well, driving my 2010 F-150 through the cascades and rockies with camping gear and no trailer, it felt like a dog. There was a portion of time where I was passing an individual floored and the truck was not whipping around the other vehicle like it typically does. This was in Wyoming. This drove home the importance of forced induction. If you plan on driving through the mountains and hauling a trailer at higher altitudes, you will be winding it up quite a bit. You will slow down in the mountains as well. It'll do the job, just not as quickly and don't plan on passing all that much.
The nice thing is that in 2007, they fixed the spark plug issue. So the motor should be just about as bulletproof as you can get with any motor. The only common failure on those motors are the cam phasers which are cheap and plentiful. In fact, everything about that motor is cheap and plentiful. Easy to maintain and cheap.