Same up here. That said there are a lot of entries for a good regional sanctioning body. Lots of entries and lots of volunteer hours keep racer costs down. There are two open wheel/SR groups, two big bore, two small bore, and a novice close wheeled group (novice open wheel group runs within one of the open wheel groups) most cars are eligible for more than one group, but usually 2nd entry is discounted. Also, most clubs have adopted a one hour enduro race and there is usually an extra special race of some sort each weekend. Here is the link to last weekends race schedule.
http://www.icscc.com/2015/announce/nwms_june_annc.pdf
Here's a typical two day schedule:
http://www.icscc.com/2015/announce/irdc_aug_annc.pdf
What keeps entries up year to year is the commitment to the novice program.