No. I haven't climbed the mountains of Colorado or Washington, nor do I plan a trip there. I'm fairly new to TT camping. For the long hauls, I prefer to fly my 200+ Knot aircraft and I stay in a cabin. I'm blessed that Texas has plentiful, and lovely State parks to explore. That will keep me busy for a while. Big Bend is not mountainous, but fairly steep for Texas. Again, no problem towing with the Tacoma. I'm blessed to be able afford any of the popular tow vehicles when the time comes to replace the Tacoma. I just hate to drive a big heavy truck for everyday driving. As you put it, the Trucklet is a pleasure to drive around town. It doesn't beat you up with every pot hole. She's more like my wife's Lexus RX 350 in ride, quiet and comfort than my last Ford Ranger or my friends big trucks. Let's face it. You spend very little time towing a TT compared to just normal usage.