I'm with most of what has been suggested here.
Do you need weight distribution, most likely not, but at 24', the better choice for sway control, (which you do need) is not friction based, so if you go that route, you'll wind up with weight distribution anyway. If not, then you'll be going friction sway and for that length, I think that wouldn't be such a hot idea. If you take the suggestion to go with a cam type sway control, then go with the smallest bars you can (around 600lbs). Hensley, though excellent, is really way overkill for something like this. Can't hurt, but it's thousands of dollars vs, maybe $300-$500 on the high end for something robust enough for your needs. I use the Reese DualCamHP system towing a 25' Safari GVWR of 6300lbs, which I don't think you are near in terms of weight. If money is no object, and it makes you feel better, you won't go wrong with a Hensley.
I agree the truck could pull even larger and heavier, to me that is not the issue.
Brake controller is a must and is most likely required by law in most states.
Outside of these that have already been discussed, go get it and have some fun with it, but be safe.