Tomatoes actually like it dry, if you water them while fruit is ripening youll get poor flavour.
If your plants are fairly big and sturdy at the time you are leaving, and they are not in a container/growbag they should be fine.
I would just make sure that youve pinched them out fully before leaving.
Cool - thanks for the tip - I don't think I did well with pinchign out last year until the final crop. These will be in a grow bag so I'll reassess the situation nearer the time.
Cool - thanks for the tip - I don't think I did well with pinchign out last year until the final crop. These will be in a grow bag so I'll reassess the situation nearer the time.