The ANG tends to favor people who have prior flight experience because most of the time it will help you through UPT. No, there is not a specialized UPT for people with civilian flight time. For the most part, you do not want to "flaunt" your civilian experience during UPT. Just keep it to yourself and let it help you (and be willing to learn the AF way of doing things). Depending on what kind of guard unit you go to, they will put you on "seasoning" orders, which means you'll be on Title 32 (State funded) active duty for X amount of time. In the KC-135, this is about 3 months. After that, you'll most likely be a part timer unless you're able to land yourself a technician or AGR position, which is HIGHLY unlikely as the new guy. Keep in mind that you can be a busy person juggling two jobs (airline and the guard). You'll have to put in a good 8-10 days a month as a new guy in a tanker unit, even if you're part time. Combine that with working at an airline 15-18 days a month and you will see that you don't get much time off.