In my experience, most hosts are be ok with early check - in if they're not booked the night before, and are around to let / check you in. (flyertalk.com)
On a longer stay I might have booked some nights with points and others with cash. (travelcodex.com)
Any parent of a young child will admit that their child always wants to read the same book every night before bedtime. (literacyconnections.com)