> I am looking for advice or any helpful tips on indoor wintering.

This is a technical matter and everything must be done right to avoid
total loss and to avoid hazards to human health as well.  I used to
inspect wintering facilities when the techniques were being developed in
Alberta under government assistance after border closure and saw both
successes and sad failures.

It is too complex to discuss in a few paragraphs here, but there are
reference materials available --  and aspects of the question have been
discussed here on BEE-L as well.

Try an advanced search of the archives at http://www.bee-l.org, then
these searches:

http://preview.tinyurl.com/d3k22de
and
http://preview.tinyurl.com/c59yznv

If you have any specific questions after studying the matter, I would be
happy to respond.

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