Welcome to the addiction support forum! Rocky, I think the first thing you need to do with those logs is figure out how much moisture is in them. You can search the web for accurate intel on what the moisture level should be to reduce cracking from shrinking or swelling--of course if you go to the time and expense if stabilizing them that will eliminate that concern--I like doing some stabilizing, but it is pretty costly to do.
Add me to the jealous of your shop group, always gives me ideas of my next home/shop--maybe my last....