Yer a keeper Bloody Mad Jack!
Damn glad to see we think a like!!!
And the truth be told... No one could afford what I would expect! However there are a few venues which I would simply add onto!!! I'll go through and post a few pics when I get a chance or feel inthusiastic!!
However I would listen to the suggestions from the reenactors for both safety and also productivity. Then I would actually compensate their efforts!!!
Yes I would pay them!!! Regardless of weather it's meals, gas money or a weekend rate..... Let's face it, with GAoP there really isn't a huge cast needed. And therefore I would also pay as to the part played and the experience of said individual. Especially if I had folks driving from state to state, I would at least compensate their travel, depending on what they brought to the table.
I would also offer them onsite camping and or location housing, within the site.