I towed my 4500 pound boat weekly to the lake, but drove two blocks only and never went on a public road to get to it. I could also do wheelies on the speed bumps, but we won't go there. Bottom line is that a 2500 pound boat should have a tongue weight of 250 pounds, so a HD class 3 receiver should work for you, provided you were not going to tow the boat for 500 miles. Check the owner's manual for the maximum towing capacity for certain.
I'm not familiar with the Hidden Hitch Round Tube Class III Trailer Hitch. If it is just bolted to the back of the frame, I believe it will be too light. My hitch had 6 grade 8 bolts wrapped on both sides of the gas tank and also rear frame mounted with grade 8 bolts, and was strong as hell. You might be able to strengthen it with some added steel straps. Once this is done, go to any boat dealer (or a private party) and tell them your concerns and they might just let you take a trailered boat out for a spin to see how it handles it?
This would work for your jeep. I found it at Quadratec.
Hidden Hitch Class III Trailer Hitch for 87-06 Jeep® Wrangler YJ & TJ
Quite simply, Receiver Hitches are the only way to go for a Jeep®. Since Jeeps® have a high-mounted chassis, most drawbar style hitches do not line up correctly with the trailer coupler... more
» Click here for details $129.99 12015.00
The one above has six separate mounting points, rather than your 4 mounting points. It is still a little more lightweight than the one I purchased, but it gives you an idea what to look for. More mounting points = higher capacity.
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