Hi Kelly,
We have a 2021 Vintage 23MBS and same weight as yours. I chose the Curt 17500 WD hitch. This is actually a size larger than recommended, but my dealer in Albuquerque, Albuquerque RV, let me test drive the smaller size before deciding, and it took only a mile on I-25 to know I needed the heavier unit. What a world of difference. This hitch is for 8000-10000 lbs gross trailer and 1000# tongue weight.
Drove back to south central Kansas with south crosswind and had never had any problems, even with semi trucks.
Always better to go larger capacity, in my opinion. Good towing, enjoy the Vintage, we are.
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