Welcome to SailNet and congratulations on your new Bavaria. That should be a nice cruise in and around the Greek Islands. Also, we have a SailNet member that lives in Croatia (I think), screen name Tomas. He may be a good local resource for you. (Haven't seen him around lately but I seem to recall he was going off for a charter in the Caribbean about this time).
We often point new members to this thread to help them understand how SailNet is set-up and to get more out of it:
NEWCOMERS-To Get More Out of Sailnet
To answer some of your above questions.
Regarding the anchor, yes, that should be the subject of another thread. But before you post your question, I would suggest you use the "Search" function to review some of the many threads that have already been posted on that subject. Then ask away.
Regarding the preventer, reviewing this thread is a good place to start. Also, the subject has been addressed previously, so using the "Search" function should turn something up. Here's another recent thread that discussed boom brakes:
And here are some external links to articles that discuss preventers:
Finally, if you have additional questions, please do not hesitate to post them.