Let's look at this another way. Assuming like most 8 lug SW trucks out there. You have typically 11900-2400 lbs empty on ra. If hitch is really 3000 lbs, you have a total of max 5400 LS on an axle rated at minimum 6000 to 7500 or so depending upon if you have an older 25 series truck like me, or on out I last 5 years or so.
Springs and actual carry capacity of truck is not the issue.
I would do this with my 2000 GM 2500. For 2 miles, level, speeds of what less than 25-35 mph....if everything that needs to work works. No brainier. I've got a truck with a 13500 gcwr! I've moved a few 12k trailers with it. Only issues are steeper grades where I don't have enough low gear in auto trans. That is 10%or greater grade.
Marty