Go back to the drawing board. Your numbers donโt make a lot sense save for the total trailer weight of 3-3.5k.
1. Virtually any TC with a 2klb dry weight likely wonโt need a 3โ extension. Not even if your truck is a short bed.
1a. Or your camper is much heavier if itโs a 9โ model on a short bed or a 10-11โ model on a longbed.
2. 600lbs tongue weight is excessive but probably necessary because youโll have to back the buggy on that little trailer due to being single axle and the weight of dist of a rear engine rig. You have no adjustability in weight placement effectively. So yeah maybe. But Iโd figure out how to lighten up the tongue weight a little.
Youโll have no issues with the truck, hitch receiver or a quality basic extension at 24-30โ long. I canโt speak for longer with the same or similar tongue weight.
A weight dist hitch in this scenario seems somewhere between heavy, useless or may not work right. But your truck and hitch will handle it so itโs also not necessary with your little trailer. Interested to see it employed successfully if you do it though.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5โ turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold