There was a character who was a beekeeper in a novel on the topic I read not too long ago (ancillary character), and you are correct, hive products were quite valuable.
As to your question, I don't know as it would matter very much? With a short life-cycle, any bee's exposed to initial radiation/fallout, would be replaced by new bee's in 30-days or so? So long as the queen survived, certainly by the 1st year after, the bee's themselves would be free of any contamination, assuming there was no genetic damage, I don't know as it would present a problem. That being said, fallout and radiological contamination of the landscape would be the biggest concern (and not really anything you could do something about?)
- K