Frost? ABC said you folks got snow there. Yeah, fresh animal manures are cause for concern. We have access to so much information with the internet, conflicting information. Often the more I research the more confused I get. Concerning chicken manures I have found sites stating; needs to be composted cause it's too hot, needs to be composted to kill bacteria, small quantities won't pose a problem, don't plant an area for 90 to120 days after removing the chickens, any bacteria will be destroy once the manure dries out or is frozen, odds of becoming ill from a small home flock manures are slim to nil & on & on. Enough to boggle the mind! After all that reading ya still gotta take your chances. I don't have room to be waiting 90 days! What about all the other manures that end up in the soil, like cats & wild birds?
Better break out the fleece & long johns. I detest long johns, never made any sense to me, especially if you're in & out of a heated environment.
Your rolling garden boxes sound pretty cool!
Maybe you should paint that trunk.