Your trailer has a GVWR of 3626 pounds, so your tongue should be between about 300 for an empty trailer and 550 when loaded for bear. So you need a WD hitch for a tongue weight of 300 to 600 pounds
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 600 lbs TW Equal-i-zer Weight Distribution EQ90-00-0600
That's the correct Equal-I-Zer. Notice the description says: " > 300 lbs, 400 lbs, 500 lbs >". And of course the max is 600 pounds TW (tongue weight or hitch weight).
Equal-I-Zer makes quality hitches that work good, but they're not cheap. That one is Price:$574.95 from an on-line discount source.
Reese makes cheap hitches, good hitches, and the really-good Strait-Line. The best Reese is the Straight-Line. (I have two of them for two different trailers.) So go with this one:
Strait-Line Weight Distribution System w Sway Control - Trunnion Bar - 600 lbs TW Reese Weight Distribution RP66082
Price:$538.11 complete except for the ball.
Notice that one is •Tongue weight: 200 lbs - 600 lbs. And that one includes the adjustable shank and Dual Cam sway control system, and has the Trunnion-Style spring bars, along with everything else you need except the ball. Round spring bars work as good as trunnion bars, but the round bars come out of the head going down, so there's a lot less ground clearance for them. If you have a choice, choose trunnion bars instead of round bars so you don't bang the hitch on the ground for every little bump in the road.
Ignore the gross trailer weight spec of the hitch. The meaningful spec is the one for tongue weight (TW).
Husky also makes cheap hitches, as well as a very good hitch called the Center Line. That same source that tried to sell you the cheap hitch also sells Husky. If they sell the Center Line, then that is a good one.
Husky 31390 Center Line Head Assembly : Amazon.com : Automotive
That Husky Center line above does not include the spring bars. Here are the spring bars:
Amazon.com: Husky 31511 Center Line Spring Bar - (500 lb. to 800 lb. Tongue Weight Capacity): Automotive
So count on spending about $600 for a good WD hitch with a good sway control system. Don't waste your money on a WD hitch that uses friction sway control.