Going to try for a new tow vehicle

I have a 2017 Ram 2500 with 6.4 hemi and 4.10 gears. It has the 6 speed auto trans. It gets 13 mpg or so daily driving back and forth to work only a 3 mile commute. Gets around 8-9 mpg towing a 24' box trailer that's around 7-7500lbs when towing to the track. When using an open trailer and car it gets 12ish mph and to be honest it's hard to tell you even have a trailer hooked up. My 30 mile tow to the track is mixed with a decent amount of red lights and I have 3 "hills" that I have to go up and down. If taking the highway going somewhere with no trailer it'll push 14-15 mpg. I've only ever put 87 octane in it and have just over 15K miles on it. Wife and I bought a small Class C motorhome so she uses the truck to tow her car and open trailer now. I thought about trading it in and getting a 1500 but from the guys I know with 1500 trucks they are getting 18-20 mpg if they are lucky. For all the more we drive the truck and the little bit of fuel savings I'm just going to hold onto the 2500 for the moment.