Yes, snakes will use large hides if that's all they have ("any port in a storm") but they do prefer to squish in to feel safe from anything sneaking in after them. Think of human designer homes promoted by fancy magazines, & do the opposite for snakes.
Meaning: No big dramatic doorways -just one modest entrance please; No high ceilings- we snakes like "back pressure".
Half logs are fine just as "furniture" but they're not secure feeling (way too open) so they don't count as "hides". Don't worry, you'll be thinking like a snake before long.Hopefully it won't be at dinner time though.
BTW, I have corn snakes & always have- other rat snakes too- they are all my thing.