Yes you can!
You can write a personal message that is automatically sent to campers after they make a booking at your place. This message can have instructions on how to access your property, WiFi password or any kind of welcome message that you want to share with your guests.
To setup your welcome message, go to your Campio Dashboard > Accomodations > Message to Guests > Edit
Just write the message that you want your guests to receive after they make a booking. That message will be sent in their booking confirmation email.