Scheduling Acuity Duration change, minutes to hours and days

In Acuity Scheduling is there a way to change the duration?
I want to set services to be booked in hours or days rather than minutes. 
We run football coaching summer camps which run for a week (5 days) or half and full days.
Minutes is not used for our bookings. Any ideas?
Thanks so much
Alex

Have you had any luck with this?  I want to offer packages where clients can book hourly services but choose between multiple options and not have to do it in minutes...