The NW Texas Field and Stream club has a 100 yard reduced High Power match the first Saturday of every month. While not restricted to M1s, you're certainly welcome to come up and shoot. The first shot down range is at 9:00. There are ten firing positions and there is usually room on the second relay. Cost is $10.
I do not know of any strictly "Garand matches". You might check with the Terrell Club. They shoot High Power once a month as well. 200 yard reduced. I'm not sure of dates, etc. You could check on the TSRA website under clubs.
The Fort Wolters club in Mineral Wells has had to restrict rifles to .223 because of some new Army rules on ranges and impact areas.
