It can happen
I go to OSH primarily to watch arrivals (and drink beer....) and it's amazing the stuff you see. Relevant to this thread, I watched a very nice Long EZ promptly shred BOTH of its main wheelpants when turning off the runway and onto the grass a few years back.
The CAP kid nearest the plane at the time did a commendable job noticing the damage, alerting the pilot, and getting him to a spot where it could be assessed without interrupting the flow. (Another thing I've noticed over the years is that those kids do a great job.)
Anyway, the now Pantsless Composite Pilot was decidedly Not Happy and was Even Less Happy when, after gathering the shreds of his wheelpants, he couldn't hot-start the Long EZ, which I'm pretty sure had an auto engine conversion.
This all played out in front of the standard scores of camera-laden onlookers in goofy hats, naturally.
I do suspect the Long EZ's wheelpants were very low to the ground, just based on Long EZ's I've seen since. I've never had a problem with the -9A in grass.
I'd actually be more worried about sinking into the ground after parking if it's been raining. We were there for Sploshkosk and they closed the field a few planes after we landed when a 210 sank axle deep (at least) *while taxiing*. A few days later we had to get a bunch of onlookers to rock the Warrior out of its divots when it was time to go.
Another advantage to the lightweight RV! Given the recent rains, I'm planning to land with much less than full fuel.