I agree with the lot here, as I have a set of two (relatively short - about 2 ft) tie downs (aka - redneck insurance policies). When properly "screwed" in (down to where the eye is slightly above grade, they can hold up to several hundred pounds of force. I also have a ratchet strap that goes across the whole boat. They are easy to screw/unscrew (a solid broom handle and about 5 minutes per screw), and I doubt that anything short of a huge (and insured) wind would upset the boat. Obviously, I would keep the boat on the ground and secure the wheels somewhere.

It's interesting they comment on the wind loads on the mast causing the boat dancing. I've been in the position of trying to lower an I-20 mast in a fresh breeze (18+ mph), and actually had to force the thing down (wind was astern). I could see how it could put a hurtin' on the boats. Also consider that wind on the surface of the water is slower (by a good bit) than wind 30'-35' off the water (surface friction, etc.)...