Rocky3204, Well I started out wanting to get a 5'er and I was looking at some pretty nice one with about 1550 lbs or something like that and with that is very doerable, if you had a diesel the payload would be even lower, like about 2300 to 2400 lbs because they are heavier.The Mega Cab add more weight so you lose a little on payload but you should be good to go, and if your MC is load it take away more weight.
I have just a Bighorn and my payload is 3,300 lbs I had my order and I didn't get a lot of option but I got the 8.4 screen with Nav, step bar, 20" wheel, spray bedliner and that's pretty much it but all of this is with the 4.10 gears. I did add a backup camera later but nothing else.
2016 Dodge Ram 2500 6.4L w/4.10 gears/ Firestone air bags
2016 Dutchmen Denali 287RE TT