Hi I think there is a recent thread on here somewhere about putting upside down bottles in the soil with a drip hole in for watering. Not sure what the outcome of how effective it was though but might be worth experimenting with different size holes etc before you go? Or you can get an irrigation system thing which attaches to your tap I think and drips where you need it but on all the time. I suppose you could put it on a timer too.
Failing that maybe you could take them to a friend's house for plant sitting?

I don't think toms will last 2 weeks with no water.
janeyo