Just doing a Google street view recon of the place and there looks like plenty of parking. But there also could be overflow into gravel or grass if enough show.

Make sure to throw a hunk of lumber or a plate of some kind for your kickstand if you get forced into a grassy area. Don't want any bikes falling over.

Crow fly distances from city centers to Groesbeck

San Antonio - 180
Dallas - 95
Houston - 140
Austin - 111
Shreveport - 180
Waco - 35

Attachment 25034