There's a comprehensive truly excellent grooming guide on the International Association of Snowmobile Administrators (IASA) website. It's pretty big (6 MB), a good strategy is to right-click the link below and choose "Save target as..." so you can open locally on your computer.
http://www.snowiasa.org/guidelines-resources/groomer-guide.pdf
Wish we had this when our club started grooming.
There's also a number of other resources on their website
http://www.snowiasa.org/guidelines-resources/
