I am not saying BG won't do well in certain tannin ponds. I think it goes beyond tannin stained, it is other chemical characteristics that prevent BG from doing well. But I have fished a lot of ponds in the coastal areas of VA, I live in the state... BG don't do well in them. I am not against putting them in the pond. I hope they do survive, but I doubt they will.
The VDGIF website has lots of good info for people who know little about pond management and want to go down the simple LMB, BG, RES, CC pond without having to worry about putting in fish in which little research has been done on in ponds...
Yellow perch and pumpkinseeds will over populate and stunt in a pond just like bluegills will. OSS are not native to VA and sourcing them would be challenging at best. Pumpkinseeds are native as are yellow perch. So you would not need a permit to stock them.
This is not a private pond and most anyone has access to it. Spending money on hatchery bought fingerlings is expensive for a pond that isn't even really yours... If you wanna drop the cash go for it, I've done it before in ponds that are neighborhood owned and dealt with other people not following "my rules" when its not really my pond.
The best place to source your fish would be Delmarva Aquatics.
http://www.delmarvaaquatics.com/ They have pumpkinseeds and yellow perch which are genetically adapted to the Delmarva region and would most likely excel in your pond.
Or you can fish several of the local lakes and collect wild caught fish and transplant them to your pond. Obviously, disease introduction would be a concern but this isn't your pond, its years old has been stocked by who knows before and will continue to probably have neighborhood kids, high water events and who knows what else putting fish in it. So I wouldn't be as concerned about introducing wild caught fish as in a more controlled private pond... Just my 2 cents.