Replying to MIddle Earth Party

I'm planning on throwing a middle earth party sometime this summer. Im thinking if I had it on an afternoon/evening somewhere in a barn or next to a babbling brook. There will be drinking of ales, smoking of pipeweed, dancing, lots of food, etc... It would be sick to get a wooden type of beer keg or enclosure to make it look old. I think some mead would be good for the evening as well.
What do you think?
Should I sell cups for like $5? to pay for the cost of the beer or should it just be byob?
Older looking attire like sun dresses for girls should be encouraged?