Thank you for the question. Like so many things, life is not perfect and school enrollment is not perfect. There are no guarantees, although most districts will try their best to accommodate parent and student wishes. The best advice I can give you is to stay in touch with the school district, get on any waiting list as soon as you are allowed, and be patient and flexible. All my best as you find a home and schools for your children.
One good thing is that there is a lot of movement during the summer months, so it maybe impacted now but come the beginning of the 2013-14 school year they may have space.
You really need to be in contact with the school district as they can give you the best advise and options.