Deleted to not hijack.

 

I've made that trip multiple times, but not when towing. Loaded heavy several times. With most vehicles above 8000' you really notice the loss of engine power. I had a 2002 F-150 with the 4.6L V8 that just barely had enough power to get to the top of Pikes Peak at 14,000' and it only had 4 adults in the cab. Nothing in the back at the time.

I have a very similar equipped truck and wouldn't want to make that trip with that much weight behind me.