Watering orchids if you're going to be a way for 2 weeks

[cythaenopsis]

I have a plan to take a vacation over the winter and will be away for 2 weeks. I don't have any really close friends or family nearby who could feasibly come to my place and water them. So, I have two choices:

1) Find a friend who will take my most sensitive orchids (about 3, seedlings) and care for them while I'm away, or
2) Find a way to rig up a watering system.

I used a siphon based water system for normal plants that partially worked (one was successful, but the other got air inside and failed). That system needs packed soil, so it won't work with orchids.

I had an idea to rig up a large bottle of water with tubes coming out of it (one to each plant), and on the ends would be a filter cap to allow a very slow drip. The idea is for it to slow trickle the water for a week, then give the plants a week without water. By the time I'd come back, they'd be doing fine and ready for a fresh watering. The degree of moisture would not be like a full dousing from a normal watering, but I suspect it would be enough to keep the potting mix moist enough so that the plants will be much better off than if not watered at all.

I looked on-line for other techniques, but most involved expensive systems designed for such a purpose and a large collection of plants. Would my technique be feasible enough? If you have a successful technique in unattended watering, please post! Thanks.