Donnie,
Please read the
Spectator Info page on either the AIRFest specific site or the general KLOUDBusters site (
https://www.kloudbusters.org). Also, there is some info on range access on the
Schedule page at
https://www.kloudbusters.org.
Spectators have a parking area separate from the flyers, however all of the flyer parking area is available for roaming, asking the flyers questions, watching the proceedings, etc. Most rocket prep takes place in the parking area under full view. The final prep areas where electronics are armed and igniters installed is beyond the flight line and is accessible only to registered member flyers. Limits of access are strictly member vs. non-member.
Your children can launch model rockets from the model rocket area (there will be range personnel available to help the kids), you cannot until you join the Tripoli Rocketry Association or the National Association of Rocketry. TRA membership applications are available on-site. There is no additional flyer fee beyond national organization membership for low-power only (G-and-under) flyers provided you register.
The rules are In place to provide a safe environment for spectators and flyers alike and to ensure that launch insurance terms are met. They aren't as daunting as they may seem at first. If you're a pyro guy, you understand the limits due to insurance purposes. Come on out, bring your family and be prepared for the same conditions you might encounter during a day at the lake: heat, plenty of sunshine, a few bugs (i.e. mosquitoes and/or ticks), and limited creature comforts. Bring shade, chairs, a hat for each person, water/sports drinks, sunscreen, bug spray, money for concessions, etc.
Stop at a one of the vendor tents or the registration tent and ask questions. Large rocket launches are unique events. I predict you will see things you have never seen before.
HTH, --Lance.