You should be fine, as long as you're not hauling 2 horses over giant passes or anything. Half tons are usually pretty good for flat/local, but your gas mileage will suck! My husband has a 1/2 Chevy Silverado that gets good mileage (for a truck) in town and on the freeway, but when we add a cargo trailer and 2 quads, it drank gas like I drink Diet Pepsi! We just secured a 2 horse Logan for us to use for my daughter for 4-H next year, and as long as we're staying local, we'll be fine, but too many treks up and down the freeway or over any passes here in WA would require us to upgrade to a bigger truck.
You can distribute the weight differently with a heavy duty hitch, which for the life of me I can't remember the name of, but it makes a big difference.