This is a USCF rated tournament G/30 Swiss System, three rounds. Entry fee is $6 with prizes based on entries. Divisions are usually Open and U1600, but is based on the players that show up.
You must be a USCF member to play in the tournament, but you can show up and play non-rated games or observe for free.
Since this tournament is also publicized through several other sources, the number of RSVPs here will not be representative of the number of people that actually show up. This tournament usually gets between 8-15 players.
Crosstables from previous matches are available at this link titled "Louisville Chess Magic". The tournaments frequently won't show up on this link for a couple of weeks after they're played.