I'm wondering how big your BP is...they love "cozy" cages & if young & 10 gal. should work ok for a while. Since you mentioned your plan to cover 3 sides
with black paper for privacy, let me just suggest something else instead, since you mention your cooler climate & it's only summer: I suggest foam-poster-board
(it comes in either black or white, & sold in with school/office supplies) instead, cut to fit (use a ruler & X-acto knife) & tape on...this will insulate the cage (keep
more heat in). It's awfully hard to achieve the right amount of heat in such a small tank though and still have "room" at the other end for the cooler temps...it
is important that your snake can "thermo-regulate" & have lower temps available. As far as getting another hide in a month or so, no...you want a minimum of
2 hides always (one on the warm side & one on the cool side), but you can use something temporary (like a small clean box that's just big enough for your snake
-and cut a "doorway" into it) until you find suitable & more permanent hides. Snakes like to feel cozy...those half-round hollowed logs are only good as cage
furniture, they don't offer the proper security to be considered a "hide". The reason all this matters now is that you want your snake to feel secure enough to
eat...if they don't feel safe & secure, they might not eat for you. So look at the size of the snake when it's curled up, & try to find a couple clean boxes* to use
that are just slightly bigger than your snake & not too tall, then cut only one doorway in it, big enough for your snake to fit thru with a meal. (*when they get
"dirty" just toss & replace)