De winterize in Massachusetts or wait for warmer weather in the south

 If there is antifreeze in the pipes I would drain it now and just don't add any water. If you have access to compressed air you can buy an adapter for a couple bucks and blow out the majority of the antifreeze. Just remember low pressure is the name of the game if using compressed air. You don't want to rupture a line by going too high.
Then when you get to the south you can add water and flush out the lines and start camping.