If I was to head down (need to graduate first!), I think I would be most interested in watching practices, BP and scrim games. Getting a look at the guys preparing for the season rather than watching them play pointless ST games. If Dunedin is anything like the complexes in AZ, having all the fields next to one another would allow me to watch a ton of guys in the same place.
I also really want to go to the DR to watch some DWL action. Almost did it a few years ago with my dad, but we decided against it while we were down there. Knowing what I know now, we definitely should've done it.