Unless you have some form of automatic watering system in place, you must turn to begging or borrowing - especially when it comes to containers.
As I took stock a couple of weeks ago of the weather forecast, state my veggies were in, and length of my trip, I came upon a simple plan that seems to have work wonders.
I was only leaving for three days, and rain was possibly anticipated for the night of our return (you know how those meteorologist like to hedge). So I decided to front-load the water by giving everything a good thorough soaking the day before I left. This would suffice for all the big half-barrels, but I worried more about some of the smaller pots.
I know that peppers can take some drought, and you even want to keep them a little underwatered in the case of hot peppers if you want to develop that heat. Ever wonder why some jalapenos are so much hotter than others? Usually its due to how they were watered. As the developing peppers are only the size of a baby's thumbnail right now, I took the chance to leave them be (after the good soaking of course).
So with all that said, I decided to give my lettuce & lemon verbena wine! With a plethora of wine bottles empty in the
watering the next day. For bigger pots, or longer away, you might consider placing 2 or more in each pot, if large enough to accommodate.