Also “It would require paving over woods for parking spaces and construction of housing for hundreds, maybe thousands of workers - potentially transforming this oasis into a sprawl of souvenir shops, fast-food restaurants and malls.”
I think I can see their grievance.
If I had the capital to start it up, I'd do tethered hot air balloon tours of the battlefield and recreate the experience in a period-appropriate balloon experience with knowledgeable tour guides...