Hi there,
I would certainly recommend
Sun Valley and the
Sawtooth Mountain National Recreation Area. Idaho
Sun Valley offers many activities such as mountain biking and
fly fishing.
The Sawtooth Recreation area is ideal for
adventure trips, camping out in the woods, etc. You can even arrange
guided tours through the area.
Another great place to visit is the
town of Boise, where you can enjoy
whitewater rafting on the rapids or simply floating on the river. This is definitely a popular and enjoyable experience for the whole family that you simply cannot pass. The
Snake River and the Salmon River are two very good hot spots for rafting.
Finally, I would suggest to book all the
activities you intend to do in advance as it would considerably work out cheaper, specially during the busy summer months as they tend to get fully booked.
Hope this helps
VacationBuddy