After long discussions here and with many folks, I've decided to just try the adapter sleeve and see how it works. Ten buck fix.
The truck pulls more than a TT though. It pulls that far less than it pulls my boat and my ATV utility trailer. For those, which both use 2" ball, I have a 2.5" shank. So no rattle or problems there.
Then, when I get around to going camping (IF I EVER DO!!! SHEESH), I will use the adapter sleeve for the Husky WDH.
If for whatever reason that doesn't work, or I'm not comfortable with it, I'll get a 2.5" shank and whatever hitch it takes to fit it, at that point. I'm pulling a 5800 lb (dry) + contents trailer, so the 13K vs 17K is not much issue for me.
Thanks for all the input.