@Sarah2109, this is what I send guests immediately after booking (tweaked depending on whether it is a booking request or instant book):
Hi xxx, I'm happy to accept your request and I look forward to welcoming you into my home!
You're welcome to check in anytime from 3pm to 7pm but please do let me know what time you expect to arrive so I can plan my day and make sure I am home to greet you.
To ensure you're fully satisfied with your stay, please spend a moment reading the listing details and house rules carefully - if you feel they might not be a good fit for you, I do have a flexible cancellation policy.
Otherwise, I look forward to meeting you and 'll be in touch closer to the date with arrival details.
Please let me know if you have any questions in the meantime.
Best wishes, Kath
And then, a couple of days before they are due to arrive, I sent them a message with arrival details (a scenic way of driving to the house, how to navigate my rollercoaster of a driveway, where to park, how to get in, etc.)