Specifically WA state ferries if anyone here has attempted.

my Avant is pretty low (it's on coilovers) and I use the ferries up here in WA fairly often without issue, even during extreme low and high tides. My biggest concern is always dragging the undercarriage as I pass the breakover point but that hasn't happened yet on a ferry boat. It does however happen every time I leave the downtown REI garage for some reason.

I know that's not a ton of help, but I thought I'd toss that out there. I usually take the Fauntleroy-Southworth run but have also taken the Clinton-Whidbey, Edmonds-Kingston, Seattle-Bainbridge, and Seattle-Bremerton without an issue yet in 1.5 years of ownership. When in doubt I just time my boarding in traffic so I can go at a bit of an angle up and down the ramp. Hope that helps a little.

Front spoilers on Ferraris can be EXTREMELY expensive and will weaken and break easily.

Those grizzly old ferry workers would toss your ass in the Sound if they saw you doing that during the loading process :) Nevermind the people in line who are waiting to get on the boat behind you.

It's a great idea, just not doable when they are loading those boats.

a good idea to hold up either loading or unloading of those boats. I cant even imagine if it got to the point where I wasnt able to get on the boat and was forced to either damage the car or "attempt" to back up.

The bottom of the ramp at the ferry can be a very drastic angle at low tide. Invest in a tide chart at the book store and you're good to go!

I went down on a run that I expected to be very empty and tested it then. I think it was early on a Saturday or something. That way there were fewer people to piss off.

But I can't honestly say that I would as daring if I was driving an R8.

Maybe check some other high-end sportscar forums and see if anyone has any input? Come to think of it, I've never seen anything especially high-end on any of those runs. Wonder if there is a reason for that.