Growing potatoes in containers....is it worth it? easy?

[nctomatoman]

If you take a 5-10 gallon pot, can you get a reasonable yield of potatoes? I've heard of growing potatoes in straw or mulch - will this work in a container? If you plant, say, 3-4 pieces of potato in a pot, what is the expected yield? (trying to figure out if it is worth the space and effort...I suspect that irrigation would be critical, as in anything grown in pots with lots of vine in a very hot summer!)