Rally Calendar is posted here.
2022 Schedule will be posted shortly.
Here is the thread with the geneal information on the rallies.
About 4 weeks before a rally, the sign-up information and activities are posted under the Texas Boomers threads here. All signups are done on this site, and not of Facebook. Some rallies, you have to call the park and make your reservation, others have the Rally Wagon Master contact the park with the registration info. Tis is explained on the rally information post.
A little later a meal or activity sign is added to the information.