My Bloods move the least out of all my snakes. They are officially pet rocks.
As for hiding it could go either way. Sometimes they are in their hide, or maybe have their head and neck sticking out. May be under the newspaper, or may just be laying out for all the world to see. My male is in blue right now and just laying out and my big female has her head and neck out of her hide.
What you need to be prepared for is a VERY heavy bodied snake that is VERY powerful. When they are in a bad mood you need to be able to handle them. My female is around 6ft and between 30-40 lbs. She can really be a handful if she wants to be.
The other thing is when they go to the bathroom it's an event. You will swear a baby elephant stopped by. Even when my female simply urinates...... She floods the cage soaking the entire thing. It's ridiculous and a big difference from my other snakes.