I have never let my snake crawl around my house because I have other animals that could pose a threat to the snake and because I'd be afraid of losing track of the snake's whereabouts.

My larger snakes are in 2x3x1 RBI reptile cages and the floor space provided permits cruising space at night. I am working hard to afford more RBI cages so that the snakes I have that are large and still in 32qt tubs can be upgraded. That said, not all of my snakes will go into cages because I get the feeling from watching them that some are perfectly fine in the 32qt tubs and might not acclimate well into a larger space- at least at this time.

I do take my snakes out about once a week for a visual, maybe a weight check, and just to have the opportunity to hold them.