The "home" range is 30-40 minutes away, so I only go once a week tops. Matches are anywhere from that drive up to 2 hours away. But - if you are willing to take on the drive you can shoot a match almost every weekend, and thats just USPSA. Throw in other matches and it could get expensive. Unfortunately my work schedule rotates, so one month I shoot almost every weekend at a match, and then the next not so much as I'm at work.
To your original question - I'd join where you have the most opportunity to practice what you need to. My "home" range action bays are very busy so it is tough to get one. I've considered switching to one ~90 min away as it is much nicer and has more opportunity to get an action bay.