I'll echo what Dustoff said.
If you've an invite to participate with an existing squad, take them up on as many slots as they offer. This is a great event but each squad has obligation that come with participation. Talk to the hosting squads' CO at times of his convenience and get a feel for what's involved behind the scenes and why. Read all the sticky posts in this thread, plus the description and all the rules posted at ahevents.
It wouldn't hurt to spend the next tour flying with an existing squad before you sign up. Post a new thread requesting an invite with a list of players in your squad interested in participating, but that's your call.
Edit: Ya beat me to it DD.