Sunday might be a good day for me, busy on Saturday, sorry. I think Delaware has some interesting wrecks off the coast, which is not too far from Baltimore. I am not sure of location of any quarries (if you were looking to do that) that are close to Baltimore. Let me know if you are interested.
Mark
Sunday may be an option, but I won't be able to give you a for sure answer for a day or two... these wrecks off the delaware coast sound intriguing- boat dives or shore?