Using base wieghts of vehicles I've owned in the past. If OP will have 3000-3500 lbs o hitch wieght, 2 passengers, 5w hitch, very few other assorted things in the bed, add say another 750 lbs.
A reg cab 2500 should do the trick. My 81 and 2000 rwd gas rigs were 4800 lbs, today's new trucks are around 1000 lbs heavier...door sticker I had 3800 lbs of payload. Going with axle ratings, another 1200 or so lbs available. Doable, with a reasonably stripped model, assuming payloads are still the same or plus or minus 200 lbs
My 88 gas 4wd ext cab 8' box was 5600 lbs, door sticker payload was 3000 lbs, with again 1200 lbs of axle capacity. Doable, but at max limits for the truck. If you have a diesel in either truck, you've lost an additional 600_1000 lbs of payload, not happening. A sw35 assuming you get some additional springs etc, might be ok. Red with 200 lbs less Tate, 6.5 box another 150 lbs les, might pull it off.
96 SW diesel crew cab 8' box. Moderate options. 6600 empty, 2600 payload door sticker, an additional 1200 or so to axle limits.....not happening!
05 4wd diesel crew cab dually, moderate optioned. 7300 lbs. Another posters letter pkg was 7600, another lower optioned rwd was 7100 lbs. I had 3800 lbs door sticker payload, a whopping 300 more than my 2500s. BUT, axle ratings gave Me another 2600 lbs of pay load. Very doable rig , including a passenger or three.
As another example, bridge law wise, the dw I got 20k on RA, approx 12000 on FA, so legally I could go down the road at 32000gvw. Am I going to recommend this? NO!!!! I'd pull it off wieght wise, BUT I'd have a host of other tickets and fined if pulled over and inspected!
Truck would not stop said wieght from 20ph to 0 in feet needed during a field test, one ticket for failed brake system, low boy to to shop to fix issue, which can't be done.unload rig so I pass LEO coming out to truck to pass breaking test, get my cert to drive truck legally on the road again.
PLUS pay more insurance, as failed brake ticket is a moving violation, vs over wieght ticket a non moving violation. Latter is not reported to DMV to follow my driving record.
So, take your pick as to how you want to operate, which truck chassis you want. If you don't know numbers, ie wieght of truck, options, cab, drivetrain etc you want or need for YOUR task at hand, the real answer as I've stated a few time, is clear as mud.
On the other hand, do diligent homework, understand us and minus of some options, wieght issues, youight pull off using a lighter chassis, OR you may be up a chassis,.if you have 4 teenage kids that in my case were an additional 800 lbs, on top of spouse and my wieghts of 450 combined. New let's add in this trailers 3500 lbs, hitch, a few bikes for kids, two Alaska malamutes at 300 lbs, and I need a class 6 truck as I will need some 6000 lbs of free payload to haul everything
So a 25 might do it, or one may need a 65 equal.
Clear as mud!
Marty