You must send them a message straight away, welcoming them! Here is roughly what I say:
Thank you for the booking, I hope you will have a great time! On Thursday, you can check in any time from 2pm, just let me know when you plan to arrive and I will meet you at the house on FFFFFFF street and show you how everything works. See you soon.
Why don't you want to meet them? Some hosts can't, but I am there every single time. Check them in, then you leave. Plenty of privacy. Be very excited, you are having guests! Hooray!