BP hasn't shed yet

[Bogertophis]

Update:

He ate the larger mouse without any issue whatsoever on his next scheduled feeding time, 4 days ago.

Since then though, he's been spending all of his time in his hide and not coming out as much as he did before.

I'm assuming that a more satisflying meal means he's just taking it easy and not out "hunting".

Do BP's ususally hide out more for a few days after eating?

Yes, that's totally normal. They eat a meal, then lay low to digest for a few days. If, at that time, they go into a shed-cycle, they'll hide even longer, so don't
panic if (when) that happens. You can always use a small flashlight (penlight) in a darkened room to check their eyes for the tell-tale "haze" (ie. "blue") of a shed.

Also, offering food too often (even when it's not "filling") can stress them, but as already mentioned, snakes aren't all the same on this...some are gluttons, but not
usually BPs.