Heres a little tale of one of my trips through Colorado.
I was driving north bound on 85 near a small town called Ault.
I witnessed a hit and run by someone who was clearly driving drunk.
I called 911 and followed the driver until he ditched his car and ran though a small farming equipment lot.
The officers pulled up behind me and I told thme where he was at , they found him hiding behind a dumpster and brought him out and asked me to identify the man, I did.
When the police officer looked in my car (just looked through an open window) he saw my Glock 23 sitting on the seat.
All he said to me was "just dont start waiving it around or anything until after we get your statement".
Keep in mind I had Maryland license plates and I was very far from home. It was clear that I was an "outsider' as you put it.
I have also OC'ed in many part of CO and never ever had a problem.