Almost forgot to post this.

I have some disagreements with this. The Wisconsin website says 16 years of age and if my boat is FLOATING away, I'm swimming after the damn thing. If the engine is running, hell no.

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And here's my truck, The Overcompensator.
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Those were all right and you were all wrong. 
A pwc is not a boat, it's at most a jet ski
When passing, you can definitely see the boat you are passing. They may or may not, and might turn towards you without knowing, therefore, you must prepare to give way.

Into the wind or current you would discover instantly vs. With the wind or current. Youll know how right that is as soon as it comes up.

I got nothing as far as why you got the others wrong 😆 

Is that a Dodge? It does look lifted, but my RAM 2500 4×4 with tow package and 26575r16 tires only took a 5" drop. 

I took the liberty of looking for where you can get your hitch locally. You have a place called Toys for Trucks in West green bay. Just take your truck there and ask the sales guy/girl to come out and look. They do it so much, my bet is they can tell you the drop you need in like under a minute.

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WTF?

I tend to overthink questions, so pretty sure that bit me on more than one. haha

dfosterf;458383I got nothing as far as why you got the others wrong 😆 

Is that a Dodge? It does look lifted, but my RAM 2500 4×4 with tow package and 26575r16 tires only took a 5" drop. 

Yes, I think it has a 6" lift and tires are BFGoodrich All Terrain T/A KO2 LT315/75 R16 127R E2 RWL 

Also, remember the tongue weight is going to drop the ass end of the truck a bit, depending on the boat and trailer, plus, 17" would be the minimum height of the typical trailer. It changes due to (most typically) tire size and spring height (on the trailer). I assume you have a class III hitch, 2" receiver.  Most boat trailers take a 2" ball, btw. 
The beauty of my suggestion that you go by the truck toy place to buy your drop is that they would 99% let you exhange it on the spot if you wound up not dead level after actually getting the boat vs. just living with a deviation or going through the hassle of an online exchange.
Don't forget to get the pin for the drop down, and don't forget to get the adapter if you have a 7pin trailer wiring slot. (about a 2 and half inch circle with a slot at the top with a cover) 
If you have a 4 or 5 pin flat connector, you don't need that.  The difference between a 4 and a 5 is that a 5 will light up your reverse lights on the trailer. The 7 pin is for a trailer that has trailer brakes and you have a trailer brake box in the cab of your pickup.

I'm telling you all this crap so that you can actually leave the boat dealer with the friggin boat after plunking down the cash 😆 

Measured with truck in garage. Flat. 

31"1/2 to inside top receiver.