Wishing you luck in finding a place to stay. I agree with mrsmac, try to get in contact with the social worker or chaplin at the hospital your son will be going to, they worked wonders for me when my DD was in hospital (although she was in RCH Melbourne).

Are you on the waiting list for ronald macdonald house? When DD had her first surgery we were on the waiting list and we thought that we were not going to get a room and lucky for us there came a vacancy 12 hours before her surgery, such a relief.

At the caravan park, maybe see if there are any with cabins? They usually hold more people, although do cost more, or I know it is not the ideal way, but is there any chance of hiring two vans? I know it costs twice as much but if it is the only option? I would also speak to the social worker in regards to this as they may be able to help out paying for the second van/part of the accomadation. I know it is hard to ask for this kind of help, but they do have a lovely foundation which raises money for this exact thing.

Best of luck in this hard time. Sorry that I cannot be of any real help.

Deanne.