We used our 86 toyota p/u with the 2.4 4cyl to pull our small pop-up that weighed around 2500 lbs for years and years. Yes on grades, we had to gear down and run about 4000 - 4500 rpms at sometimes 35mph. We still have that truck and used it for a toad behind our mh for several years....and it still runs like a top with over 275000 miles on it. You're no gonna hurt the truck.
I'm sure you can expect close to the same. You will be slower than the rest of the traffic and probably will be holding up those behind you. However, that's what pull outs are for.
Ron