Yeah, I've dove the Cayuga. It's a nice wreck, but kind of average for the Straits, other than the story behind it. It is a long ride out to it. I haven't been out to it for a few years.
Diving the Mather kinda goes like this: go if the weather allows you. It's not often that a weekend combines with good enough weather to comfortably dive the Mather. I'm certainly up for a Mather dive, but don't get your hopes up. That wreck is very weather dependant.
With wrecks like the Cayuga and Mather, Dan calls them "targeted trips", meaning they are way out of the way or are deeper than "normal", and they'll cost extra (how much more depends on a lot factors). That wreck would probably be considered a technical dive. It just isn't worth going out to for a 10min bounce dive. If you guys want to dive the Mather, I'm sure the price would go up to $110ea, and you'd two dives in for the day (maybe the Panther, Vienna, or Sadie Thomson as the second dive).
Dan checks his e-mail at work, so I should hear from him on Monday.
Mike