grain critters

I'm just getting started in milling my own grains and I wanted to be certain I know what I'm doing.  I've read some conflicting reports from all over the web and I have a few basic questions that I'm still unclear about. 

Any help is of course appreciated.

1. Is it recommended that I freeze my whole grains before using or storing?  How long should I do this?  I've read that a 48 hour freeze will kill the eggs of any critters that may be in there but I've also read that it's not much of an issue.