I have a similar setup, but this appears to be MUCH more user-friendly. As far as an anchor, though, I made my own anchor with 4 or 5 two-foot lengths of galvanized chain clipped onto a carabiner clip.. It is plenty heavy to keep my kayak in place, plus I can remove lengths if it is too heavy for what I need. It also is much less likely to get snagged like the typical anchors are.
I agree with AggieKayak that pieces of chain are hard to beat with regards to hanging up issues and adjustability. In most circumstances I can get by with a single 16" length of heavy chain for something as big as my Big Rig. But if you fish deeper or in currents/winds that are strong, just carry along another length or two of chain and clip them on.
Chain also take up less space I think.