Phil, just having some fun. Nothing wrong with shopping but lack of no decision or too many options will kill a man has been my experience.
Dave I agree. When I mention getting rid of my Duramax for a few yrs as we won't have a camper, I started looking at new 1/2 tons. I wanted a F150 when I bought my '11 Silverado new, but the F150 was $6500-8K more. Man, they are even farther apart for the '19's! I had to go back and look and make sure I was looking at comparible trim/options. I feel your pain in this arena, but I think almost everyone is as a consumer, it's crazy!
My final thoughts are you are not going to be happy with the 6.0 turd. Yes it's reliable, yes there are plenty of parts, but it's no where near a diesel and given how much you drive and having the camper, it will work. But won't be ideal. You'll be out of the 3/36 warranty before you blink and locking it in gear if having to traverse mountains gets old as it stays at 5K rpm and the thing sounds and feels like it's going to puke.
I don't see you being happy with a gasser but as adults, husband's, and fathers we have a responsibility to not just scratch our itch but find the best fit for life and budget. I respect you for that decision and since payload of a 3/4 ton is needed, a GM 6.0 is, what I feel, the right fit. You will just have to deal with the difference and accept. Once accepted, life will be good.