Clients seems to want to give you a round about drop off and pick up time? The pick up time is always way later than the drop off time. What are we able to do when the clients come later than the agreed/promised time?
At the meet and greet it's easiest to explain the pricing structure, including that a night of services is up to 24 hours and since you understand the pick up time may be several hours later than drop off time, you'll add a cost adjustment for the additional daycare hours before booking.
When a booking request comes, make sure you get the approximate drop off & pick up times (in writing-attached to booking messages) and add the appropriate Cost Adjustment amount before clicking Book It Now.
I don't charge for late pickup but I indicate that 9pm is the latest pickup time or they will need to book an additional night. I do allow some flexibility for traffic and isolated instances but am fairly strict. Been up til 2am too many times and won't do it anymore!
I have a policy on my website that the drop off time is the pick up time. I had a client take advantage and not show up until 3-4 hours later. This time had a request from a client who stated they would drop off at noon but wont be picking up until 10pm, therefore I modified the booking to include the daycare fee. They were pretty upset but I explained to them that Rover only charges for a 24 hour time period and anything after that we aren't getting paid paid for. They ultimately decided to confirm the booking request.