@Rhonda58 good for you for considering rules before you need them!
there are those who believe that Please doesn't belong in rules (makes things seem optional or like a request rather than required), and those who just can't leave it out.
another style idea is that you could lump things into categories:
dog, cleanup, etc
rather than having them all listed separately.
My personal strategy for rules is that my House Rules list the things that I would kick someone out over or bill them in a damage claim for: over occupancy, not locking up, running electric/water inappropriately, not having a complete ABB profile, third party booking etc
I use the House Manual for more instructions type things: how to clean up, what is the checkout procedure, etc. These are the things that are my preferences and that if they didn't do them, I might review them poorly but it won't be the end of the world.
My Real Texas Barn listing has a fairly detailed rules list for reference (Better Business Barn, is only for smaller groups & requires prior previous good reviews so its rules are more streamlined)
Best of luck with your hosting!!