Looking to relocate from Hawaii

Our family is looking to relocate next year and Billings is on the map. Our kids are 6 autistic boy and 8 year old girl. My question is, are there enough activities for day to day life aside from big things like skiing? Also, is the crime that bad? We would be looking to buy a house more outside of town like maybe within 20 to 30 minutes drive max. We are active but i am curious as we are moving from paradise but aside from the beach there isnt much to do. Thanks for any input.