Piffle, Bobe-ster. A humid 95-degree day in Virginia in late August is mild weather, aint't it? You must be used to this by now. 'S only for an hour and a half, and not during the hottest part of the day. Still, none of us is getting any younger, so you're wise to think about taking precautions.

Page County Farmer's Market, is it? Well now, I see from Google that that's in Luray, VA, apparently at the train depot. If you're performing at the same location as the musicians in the pics on the farmer's market entertainment page, it looks as though you'll have a bit of shade under an overhang, which will be helpful. You can skip wearing a hat if you're in shade, and let some more body heat escape from the top of the head. But if you're in the sun, the hat is a must, along with sunblock.

Also it looks like you'll have access to an electrical outlet, so you might bring a surge-protector strip and a couple of desk-size fans (maybe one pointing at you from the front, and one pointing up to hit you between your back and the back of your shirt!).

I like those hand-held battery-operated fans attached to water bottles with triggers to squirt yourself with -- they're great gadgets.

I second Stilly's comment about the open cooler. Leave it open for melting ice if you want, but bring a second cooler for your water/Gatorade/beverage of choic, and keep it closed to keep the drinks cool.

Definitely use the bandanna, the sunglasses, the medium-weight strings and the lightweight loose-fitting clothing... but skip the socks, and wear sandals instead of heavy shoes or boots. We won't think less of you.

Have fun! Check back in afterward and let us know how your gig went.