To start with, a wreck anchor with a lot of rope. Protect the rope from chaffing by threading it thru a several foot long piece of 3/4" garden hose where it attaches to the anchor or better yet to the chain on the anchor. Expect to lose a lot of bottom rigs, so, tie them up the night before venturing out. Make your own bottom rigs by tieing a droppler loop(s) for the hooks and a perfection loop for the lead weight--40lb test works well. Attach prepared, snelled hooks to the droppler loops. No point in buying anything expensive as you are going to lose a lot. Go to "Chumlord Fishing" web page for detailed pod casts as to how to tie the rigs.
Also, recommend that you go out with another (buddy) boat, as the wrecks ae generally well offshore.