Re: Sanitizing the boxes and drawn frames
If you don't have extended periods of freezing weather you might be able to cycle frames through a freezer since you don't have that many to work with.
Note: The above study has important implications to beekeepers. What is tells you is that in most of the U.S., winter freezing should be enough to kill most of the spores of N. ceranae! This supports the observation of a number of commercial beekeepers that letting deadout equipment “rest” for a month at cold temperatures resulted in better colonies when restocked in the spring.
To everything there is a season....