Many thanks for the replies.
The "friend" that wants to try cowboy action shooting is Mrs. Leverfan, and she spent a good part of her Saturday at a gun show, checking out different guns. She didn't want replies to be colored by any reference to her gender, which is why I posted as if looking for guns for Gilligan. In the past, when she's asked questions for herself, some fellows have a tendency to under-estimate how much she can handle, based on her gender. After years of shooting 12 gauges, 44 mags, and big-bore lever guns, mostly better than I can, this gets under her collar.
Matches and clubs are hard to find in our area, and she was wondering if there are any books/videos that give a basic idea of what a match involves. She still hasn't decided between cap and ball or brass cartridge in a competition revolver, for example, and she'd like to know what the stages are likely to involve before she buys herself a new pile of guns. There is one club that gives a basic overview of the game about one hour from here, but you have to have your own guns, first. I guess cowboy action just hasn't caught on here, yet. We're thinking about going to one of the regional or national matches in the near future, but the more she learns, the merrier she is.
Just between you, me, and the rest of the world, I think she just wants to get involved in the sport for the clothes, but she's one heck of a good shot, too.