QNS--great idea to call nearby churches. Youth groups are often looking ways to volunteer in their community...of course the reward of pizza would probably be good incentive too.
Bev-not sure how far apart your two houses are, but you could have kids from a church close to your old house help load and then have a group near your new house unload. You could donate a portion of what you would have paid the movers to each group.
Off to mix up some oj bars, then get kids up to do some school. I started with two younger ones (11 and 13) this week. Oldest (15) goes back to school Aug 21st.