@Jeanette37:
I'm sorry you had trouble with your guest. Sometimes life gets busy and we forget a thing or two. However, in response to your questions, the general rule is to have no expectations that the guest has done more than looked at your pictures, read your listing title and checked the box about home rules whether they actually read them or not.
We usually message every guest two or three days prior to check-in with arrival instructions. First, that reminds us that they are coming and who it is, but it also provides the check-in information the guest would need if we are not present. Many hosts re-list the important home rules in the same email.
Learn from this episode and move on. Don't let it get you down but some little changes will help you going forward.