Dave,
Thanks for the reference. BTW, I've visited your website several times in the past. It's a good one. My reference for the Battle of Culebra is from Dr. Holger Herwig's excellent book, "The Politics of Frustration: The American Navy and German Strategic Planning". The section in there on Ops Plan III (the proposed German invasion of the US) is fascinating.
Avalanche Press (www.avalanchepress.com) has an entire series of wargames based on the various Plans (Plan Red, Plan Gold, etc.) The scenarios are excellent and I expect that they would easily translate into Victory at Sea. BTW, have you ever played SeeKrieg?