Bookings during pandemic?

I think the responses will be largely determined by the types of service provided. It appears you offer Boarding, not walks-visits-house sitting stays in someone else's home, which would increase your exposure level beyond boarding.

For Boarding dogs, if they're dogs you already know (meet & greet, initial stay done), then it's fairly easy to arrange a limited-contact drop off outside the home, both wearing masks, and passing back and forth a limited amount of items (the leashed & harnessed dog, food, Rx, and whatever else is needed). Doing drop offs ad returns in that way, I wouldn't be concerned about all the variables you mentioned.

If you were going to invite people into your home or go into theirs, my answer may be different.