The meetings and committees are normal here too. This is not a strong union state so it is what it is. Sometimes it's valuable, but a lot of time it's busy work created by upper level admins who are trying to justify their jobs. The vast majority of the time, I find informal collaboration to be more useful than admin or coach directed "collaboration" (meetings). The amount of planning time you have in your current school is not at all typical, IME. My experience has been 45-50 minute planning periods. This is one of the reasons I said you'd probably find the grass isn't greener. The fact that this new school told you up front that there are a lot of behavior issues would also be a sign to me that behavior is going to be worse than you're used to. I personally would still turn it down due to the instability with the long term sub thing, but that's just me. You obviously have to decide for yourself if it's worth the risks. You could always tell them to keep you in mind if a FT job does open up.