Yes.
Feel free to use this time to get as much done as possible. If you need to schedule the appraisal, the carpet guys, the painter, the granite guy, the decorator, and give your in-laws a tour, go right ahead (just remember Q19).
The only time that might not be a good idea is if a Radon test is being conducted. According to EPA Radon protocol, closed-house conditions much be kept the entire time the electronic monitor is in place. This means all windows and exterior doors must be kept closed (except for occasional use while coming and going).
