FWIW, I bought an anchor when I first got in to this. I quickly realized that there is virtually no situation in which I wish I had an anchor out on the water. There are not too many times that I would like to sit in the same place and fish, or drag an extra 5 lbs around with me, that includes the bays, big water, and fresh.
I do know that anchors are pretty popular on the east coast though, maybe its just a different style of fishing?