Think Elbert means "West Coast" above....
Trip by boat around back by Cayo Espanto is not bad at all, just be wary of your draft and the tide. You need to know how to navigate around Cayo Esapnto (if in doubt, use the barge channel and go the long way.) Once you're past Cayo Espanto, the main thing to watch out for are fish traps! That and be careful where you come off plane, as you might not get back up ON plane and you'll end up poling for a good while.
RE: road, no appreciable way to go either north nor south once you take the East-West road to GBE. Even if you were to drive the shoreline, you would not make it far before you got a flat (or 2 or 3 or 4) given the rockiness there.
Go by boat...
here is why I love it back there:
http://www.youtube.com/watch?v=9htwwJgHWE8