I haven't had problems with sea sickness myself but be careful with the drammamine and drinking too much beer. It turns off your ability to throw up even if you really want or need to. They also make you drowsy, especially with beer as I'm sure you know. They are the same medication as benadryl and unisom, all are just packaged and dosed a little different.
Try that patch out to see if it works for you, but keep some drammamine handy in case it doesn't.