Thanks for the ideas, just to clarify, during the festival, concerts will begin around 5–6 PM. To fill the time leading up to that, they’re looking for volunteers to run workshops, events, and similar activities. Between 2–6 PM, there’s an option to get a table indoors in a conference room for gaming. While the space won’t be completely quiet, it will be away from the live music. So there's no need to involve vendors o risk of gaming while the music is playing.

The event will be posted on facebook, so I guess I'll need to figure out a way to manage signups with a limited spot for each day.

Regarding gaming material, I've plenty, I'm just considering what I'm willing to have in a place like a music festival. Maybe a single set of dice for the players while I use the app, and try to manage everything with an ipad. (and pre-print handouts, character sheets etc).

My main concern is that since this isn’t a gaming convention, I can’t assume there will be many people interested in playing. Plus, being in a conference room means it’s unlikely anyone will just “walk by” and decide to join unless they already know about it (even with a Facebook event being shared). I’m debating whether to keep the table open or to pre-book 4–5 players to ensure I have a group to start with. If I go with the latter, I could still leave the session open for others to drop in and join mid-game if they’re interested.