At Clay Pigeon your race application has to be with the Club Secretary the weekend before Race Day. The application form is available as a download on the website.
Practice Day is usually the day before race day, in Clay Pigeons case the Saturday. It is not compulsory to attend practice before the Race on Sunday.
You can arrive anytime after about 8am, but the track doesn't open until 10am. Normally on a Saturday even a non-race saturday it is pretty busy, so the track time is split between different classes to make it safer. Depending on the number of people there you generally get 10 minute sessions every 30 to 40 minutes.
Things to look at
When to do scrutineering at the end of Saturday or come back early tomorrow. Most people seem to queue up after the final practice session and get it done. That gives you time to fix any minor issues.
Arrive at track for 8am
scrutineering will be open and you need to get that completed if it hasn't been already.
Sign on to race control and hand in your license, and check the transponder number is correct.
Drivers Briefing 09:30am
They cover what tyres can be used and general rules.
This is Just 3 laps, but compulsory as I understand. Practice is supposed to be 10am. However, be ready as sometimes they call you straight to the grid after the drivers briefing, which starts at 9:30am and normally is only 5 or 10 minutes.
Normally 3 heats, but there may be extra heats if there is more than 20 karts registered. At Clay Pigeon they get all the heats done and then have a break for lunch. But tihs can sometimes be as late as 14:30
Start after lunch break.
You should be able to get your license back (make sure its been signed if a novice), once the final has been issued. They clerk of the course has to sign them off though so that might take a bit longer.
These happen together at the end of the day, normally around 5pm.