Newbie to travel trailers- need advice on selection

Oh, I have two vehicles- a V8 4Runner with 7000 lb towing capacity and a (lifted with 35s) 4-door Wrangler with a 3500lb towing capacity. I am not sure what sway control to use and if I need load distribution for either vehicle. Very confused about that. The dealer says the Equalizer E2 is around $550. They may prefer to use that for the Jeep but it may be hard to adjust it to meet the height diff of both vehicles.

Any advice would be appreciated. I need to decide pretty quickly.