We found a local landscaper supply place where you can buy mulch by the half-yard. I chose the brown cedar mulch because I like the colour (it looks very natural, like earth) and the texture (the cedar is mostly shredded, with a few slightly larger bits here and there). We were able to fit in one and a half yards into our short box pick-up truck.
Boy, have I been having fun shoveling it out and putting it on the garden. Stay tuned for photos of the garden with the mulch on it. Oh, and I'm pulling out or hoeing up the little weeds that are starting to appear before I put the mulch down.
I hope this works to keep the weeds down!