No... NO ... NO... Taking the kids for a spin is a proven waste of time...
Sailing is sailing.. racers decide on what class is more fun and meets their goals (regional champs, NA's, ISAF qualifier, College Admission, Olympics) ... it's not a novel new experience... So... they want to see the opportunities available and how doable is the class.
Ultimately... a kid needs to buy a boat... so parents are going to want to see a real commitment... a training camp of a couple of days will cost some money... when the US high performance program delivers.... the parents and kids have real information to move forward.
Final point... Kids don't want to look bad to their peers or anyone... So, they don't just jump into something where they will look foolish... Programs are a work-around for that psychology. (Tried for years to get kids to take a free boat to a race... does not happen! .... THEY love to just sail it tho)
What you propose is best left to the boat builder... it's called marketing. Or a Yacht Club... it's called membership drive.
On point 3, is it? How many of those AYC sailors have been on a double trapeze boat? I can count on one hand the number of those boats parked in downtown Annapolis, so I'm guessing the percentage isn't very high.
The fundamental issue is a culture switch. When speaking directly to the high school sailor, they would love to be on a double trapeze boat, but they aren't going to do it if their friends are off campaigning C420's. The solution is to take some of that 420 funding and buy 6x F16's/29er's etc. and build a viable fleet with paid coaching. You won't see people break out of the college sailing mode until the yacht clubs change their base program. Its too easy for the parents to drop the kids off at the club, coaches take care of transportation, no need to move boats, and they're hanging out with 18+ of their like-minded friends.