When you say basic log do you mean a half log with an opening at each end? More of a tunnel than a hide. If so, he probably doesn't feel secure in it. You need something with only one opening. I got a hide that looks like a rock from petco and even though it is a tad big my bp uses it just fine. I did add moss to the inside to help make it feel secure, makes the hide seem smaller. Plus during the shed I keep it damp to help humidity.

The big box stores don't have very good options for smaller snakes, already not around me.