I think you did exactly the right thing.....water them heavily before you go. Unless its drought hot dry country you are in, I bet they should be able to take 2 weeks ground planted. Too bad you didnt have more warning, as the longer they are in the ground, means more root expansion and moisture pickup.
Water surrounding ground heavily before you go. Create a 4 foot diameter "ring" around the plants base and mound up a bit of dirt so when you water heavily before you go it will soak the entire area.