When we went there a couple years ago I found this website very useful for planning: http://www.suedtirol.info/en/ We did not visit many castles-but this site does have complete information. We did visit the villages-and without fail they were very charming.
Also, I'm not sure when in June you will be there but they have a series of events in June in a number of different areas highlighting wine. Some of these take place in castles. This culminates with 'wine cellar night' when many wineries open their doors and have special events (and a shuttle bus so you don't have to drive!). Both are described on this site. www.suedtiroler-weinstrasse.it/english/
Thank you for your response. Very useful.
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