I know this is a really old post, but I hunted here a few times as a kid with my grandpa and thought I'd put in my two cents.
This is definitely an old boys club, but I don't know about the no rednecks thing. Unless by rednecks you mean poor folks. There were certainly a lot of rednecks there, they just tended to be lawyers and doctors and business owners. Largely it was older people, but a lot of them would bring their kids/grandkids out too. I remember one of the full timers (there were only a few in the years I hunted out there) worked out of Hollywood and had a house full of memorabilia from movies - he had a jeep from one of the Arnold Swarzenegger movies and a bunch of pictures and whatnot. As a kid that was beyond cool. A lot of them were die hard hunters too - one guy had a house just full to the gills with trophies from Alaska/Africa hunts - lions, tigers, bears (even a polar bear!), cape buffalo, elephant tusks, just everything a young hunter dreams about until they learn about money.
The rest of the folks had small cabins (mostly mobile homes) that they'd come out just before the season started and get them livable. Pretty much everyone had a garage with boats and equipment they stored year round.
As for the rules, there were a lot, but they seemed to me to be lightly enforced. I got yelled at a few times for zipping around the "camp" on a motorcycle too fast, but was told it had more to do with the hour and much less to do with the speed (zipping around on a motorcycle at 5am a few days before the season opened).
This was in the mid-90s so I'm guessing things might have changed a lot since then, but I don't remember ever seeing a club that sold food/drinks like at a country club. There was a central dining hall area where they held meetings/lotteries. The day before the start of the season they'd do a really big cook out for everyone - cornish game hens (which started my love affair with those), steaks, the works. Lots of beer and scotch. Very communal, very fun.
I don't remember if it was daily or weekly, but they had a lottery for the maintained blinds out on the water. Everyone would get together and take a number and then they'd do a lottery for either blinds or the numbers would match up with the blinds. I honestly can't remember how it worked (I seem to remember it changed depending on how many were hunting that day/weekend). When you got your blind, you jumped in the boat (I admit they had some of the nicest launches I've ever seen) and headed out to your blind with your thermos of coffee/scotch.
They had a really nice shooting range too, with trap/skeet (of course). Pre-season and after coming off the water, it wasn't uncommon to find people down there practicing with their shotguns, and shooting over exotic rifles. Not surprisingly, the members tended to have amazing shotguns, and some other really expensive, exotic long rifles. As a young man they were all happy to let me play with them, which only entrenched my love of shooting.
Granted my grandpa was a doctor and had quite a bit of money, but the $25k/year for membership seems a little extreme. If he was still alive I'd ask him, but he's not. From what I know of him, and how much he actually hunted there in a season, I can't imagine he'd spend that much a year on a membership. Then again, I know when he was younger he used to go out there a lot more and he might have just kept his membership up as a matter of course.
All in all, it was a pretty wonderful place. The people were very nice and very helpful, more so than most hunters I've encountered in the wild. People came together to help each other - someone's boat motor crapped out, someone else would come over and put their spare on the boat so everyone could get out in the morning. Some of my favorite hunting memories as a young man were there, even though I never got that many ducks/geese (they had an area for geese hunting in season).