I hate to admit this...but Tom H with a little input from Joe are right on the money. Lets sum it up.
1) Yardages. If sprinker heads are marked/numbered and easily decoded with a yardage book I don't see the problem here. If you can afford to get your self to Bandon and pay the green fees, you can afford the $5 book. And they are small enough to fit in your back pocket, so I don't see the big hassle to using them.
2) Printed yardages on sprinklers. I don't know about you guys but its often that my ball comes to rest near one, where its hard not to take a peak. And if they are there, I think people will look, if nothing else out of habit. When I play I'm usually looking at 2 or 3 of em before I even get to my ball so i can quickly size it up once I'm there.
3) Based on 1 and 2, all groups are pleased. Range finders, yardage books, caddies, caddies with Bushnells, or flying solo, everyone is pleased....except some which leads into point 4.
4) As Joe pointed out, they already threw down the gauntlet with the no cart rule. Throw in that theres no spa, or frilly shops, or other retail non-golf crappola, its a throwback to a yester-year type of golf experience. Is it such a stretch to go to no yardage markings?
5) This isn't exactly your joe-six pack destination as carts are banned and lets face it...the average blue collar join can rarely afford to play at a place like this anyways. I think the type of regular customer who makes it out there would be easily adaptable to a non-markings course.
If the jury is still out, my vote goes for coded sprinkler heads as well and let everyone have thier fun in thier own way. Who knows maybe Melyvn would even consider a trip over to see it then.