Hello and many congratulations on the successful production of your bump so far. I am very excited for you!!
My 3 stays were of about 1-3 weeks because I had a premature baby with short stays in the Neonatal Intensive Care Unit. I recovered well from my C sections but these necessitated at least 3 days to get me mobile. With no.1 I had a few days clamped to a hospital bed with pre eclampsia and a good book or magazine would have helped there! (was admitted after a check up when my bp shot up so please be aware that you will be at higher risk of this happening with the resulting early admission).
So it is the big unknown based on plans that may change. Have your bag ready early with plenty of diabetes gear, snacks and all the usual things people will remind you of (headphones, sanitary pads, nursing bras). Don't expect the hospital to supply you with insulin, test strips etc. and I mention food because the hospital variety isn't to be relied upon. I hope your partner will be able to stay nearby rather than need to travel 2 hours each way too as you will need some support whilst 'in' . Best of luck with your Winter baby in any case.