Do a gravity check mid to late next week and then one about 4 days before you leave. If you don't see a change, bottle it up. If you have any doubts after you bottle it, get a big rubbermaid bin (with a lid!!) to put it in and keep in in the coldest spot in your house (bathtubs are great for this if no one will be using it while you're gone). That way, it will carbonate nice and slow and if there are any bottle bombs, you have a buffer between you and glass shards.