I never see my BP during the day!! Also, I tend to go to bed early, so I rarely see him at night either, but my husband says he moves all over the tank at night if it's dark. They are VERY shy snakes and will tend to hide most of the time.
When mine is in shed, he won't move from his moss box for up to 2 weeks!
I finally decided to take nice photos of him and hang them up near his terrarium, so I can look at him anytime!
If I really want to see him, I take him out after 8pm and hold him on my lap on the floor. I usually let him wander a bit, take pics and then put him back before he cools down too much.
Of course, I see him at feeding time too when I put him in his feeding bucket and take him out again.
They fatten up pretty fast. Read through the caresheet on feeding again and if you follow that, you shouldn't need to worry.