Helper springs, add-a-leaf or re-arch?

2017 Access cab 4x4 sr5. When I put my boat on the drop hitch it drops the rear. Yes, I’ve adjusted the tongue weight. I looked at the rear springs without the boat and they are pretty much flat and straight. Was going with add-a-leaf, but the ride without the boat will probably be pretty stiff. I don’t want to raise the truck unless I have to. Would helper springs work? Anybody have any experience with them? Has anyone had their springs re-arched? We used to this when I worked at a Chevy dealership
Thanks in advance

 

Check out the Roadmaster Active system. https://activesuspension.com/