Eliminating double scheduling

This is not easy to do natively.  There are some somewhat brute force solutions I have implemented effectively for clients with similar resource scheduling clients, but that would take a one on one discussion and demo.  Basically it involved setting up summary fields for each day out for say a 30 window to count the number of bookings that employee has for each of the next 30 days.  Then I translated the numbers to pretty icons to highlight the double bookings.