Greetings!
Maintaining humidity levels in an entire enclosure can definitely be tricky. Unlike some other types of snakes, ball pythons do not seem to require a sustained humidity level in order to be comfortable...as such a humid hide is probably your most straightforward solution. Nothing fancy is required for a humid hide: it could be a plastic container with a hole cut out and filled with a moist substrate (e.g. sphagnum moss) and then the moisture levels checked on a regular basis.
Over time I have personally stopped paying attention to humidity levels and my only concession is that every enclosure has a water source that is large/deep enough for the ball python to fully submerge itself within. I don't maintain a thermal gradient (ambient=80F throughout) so it is irrelevant where my water bowl sits. It works for me.
As for your second photo your bp looks like it is just 'hanging out', the body is relaxed and the head is propped up--nothing unusual going on.![]()