28 lb rocking chair style anchor, four feet of chain, rigged as breakaway, 200 feet of 1/2 inch rope, anchor buoy with slider. The slider is optional, but nice.

This assumes that you're salmon fishing. Sturgeon requires more rope if you're in the deep holes, and maybe a bigger buoy.

All can be had at GI Joes.

I use the above to anchor a 19 foot windshield sled. In addition to the anchor, you will want two sea anchors rigged to hang from your stern corners, which I got at Boater's world.