(Bob B) Roanoke-Blacksburg Regional is 41 min by car (Google maps):
https://www.flyroa.com but this is a small regional airport. Nearest big airports are several hours away as you said. Does this work for ~1K people coming/leaving in waves? 6 gates for Roanoke means people will be driving to a big airport or waiting forever since flights will be full. I talked to some people who have experience and they said everyone will be going to one of the big airports, which requires car rental. And people don't all come and go at the same time, so there will be problems from beginning/end pulses, and then if you need to leave/come back that will be complicated. Their committee, who has experience getting in/out, should comment. They must have worked this out.