Personally I agree that charging $38 to potential customers for a walk through is ridiculous. I went there one time late in the day to deliver gear to someone (couple of years ago before I was a regular and had an annual pass) and they tried to charge me. I told them I am too big for the kiddie park and have no gear, just dropping off an item and they let me in. My recommendation to others who are thinking of checking DS out would be to call in advance and speak to Mgt about walking through late one afternoon. Would really surprise me if they did not honor that request.
Those 2 divers were definitely the early birds in their group of 6-12 divers, usually 2-3 can gear up comfortably per table, 4 would be pushing it in 2 shifts of paired buddies.
I know couples who go early and snag 1 table and others who prefer to be away from the crowds and bring a canopy and a couple of chairs.
There are 2 dive areas, most of the OW checkout dives occur on the "student" side (to the left of the entrance) and advanced training and the rest hang out on the peninsula side. The theory is that the worst viz is on the student side, not so sure about that though

Aside from human intervention, the viz has a lot to do with the time of year, algae growth, change in temps, thermocline flipping, etc. Overall, it is tied for top place for quarry viz, imo.
Have to agree with you on the food, we usually bring cooler and a grill, seen others pack subs, drinks and their fav dive snacks. When I am lazy, the concession subs would be my recommendation for a decent option, high priced yes, but convenient.
I have been to 6 quarries in VA, PA and OH and Dutch by far has the most underwater attractions and platforms, dive entrances and best bath houses. The rest are pretty rustic by comparison.
A lot of divers have asked me why I would ever dive in a cold dark quarry. First, the annual pass makes for a lot of cheap diving. There is no way my skills would be where they are without quarry diving, not only do they but also my equipment get a regular workout. I really believe I enjoy my vacation diving more without all the neoprene/drysuit, weights, clear viz because of my quarry experience. Also, like others have said, it is a great place to take classes and get comfortable in new gear. Although the annual pass is the way to go, I would def make sure quarry diving is your cup of tea, because for some I know who have tried it, they will never go back. (I believe the word lunatic was included as part of their response

)
I really hope with some of the additional info here, you rethink your first impression and give it a try :bounce4:
fwiw, I am not a staff member of DS but I am one of those crazy DNY'ers
Edit: the various fish include, blue gill, perch, bass, and Koi and they are all friendly, fat and happy . . .