They are beautiful, but for the Colorado backcountry, you probably need to go with a popup if you want a TC. Height is usually pretty critical when in the forest. It is no fun getting out all the time to cut branches.
You probably know this already, but on his blog he says the camper weighs 910 lbs, which only leaves you 450 lbs on a Tacoma access cab for you and your stuff.
I feel like the most versatile rig in Colorado is a Tacoma with a shell and platform for sleeping. I used to live in Crested Butte and went all over the place with mine. No problem with the narrow roads or trees, and not that difficult to get out of trouble when the going got rough. Camping gear went in the back but I would take it out at night for sleeping and put some of it on the roof didn't get it. Cooler and food went in the cab to keep the smells inside as much as possible.
If you want to camp in the winter it's better to have more shelter so a popup is much better.
