Capua, Italy-Ancient Sites & Museum Info

Basically I'm just looking for any tidbits of info on the following
sites or others of interest. It will be a daytrip from Naples in March
and my 3rd attempt to visit Capua, something has always come up on prior
visits.
The Amphitheater and it's museum, the location of the slave barracks
where the Spartacus Revolt started, info on visiting the
Mitreo/Mithraeum (my guidebook says you must book the tour at the
Amphitheater?).
Also can I get a detailed guidebook at the amphitheater?, audioguide?,
local guides?
Thanks...Regards, Walter



...And Paradise Was Lost...like teardrops in the rain...