I agree with Nan's assessment of Helena
It isn't as crunchy as other places, but there is plenty here and a very kid oriented town. Tons of free activities to do with children. A great farmer's market, a nice (though small) HFS, a few private co-ops, nice homeschooling community. We have a mainstream ped who is no-vax friendly, and I've had 5 non-medicated births (including twins) of no-vaxed babies, no eye junk, etc. at the local hospital with no fuss. (I know you're a HB'er, but I think it speaks to the fact that even the hosp here can be okay!) I think there is a pretty good tolerance for people who are different or have different choices here and it is a pretty stable economy with the state/fed presence, so depending what your dh is looking for, there is plenty of work available. Rent/Buy is more reasonable than Missoula/Bozeman also.
You can pretty easily get around and if you buy in town, it's easy to get around to anything you need on foot or bike. If you're familiar with the 'Walkability Score' site, most of the type of houses Nan mentions would score near 92-95--Walker's Paradise. I live just south of the older housing district in a 60s rancher type area and still score in the high 80s. Most of Missoula including even the University area scores in the 60s. They do have a nice bike infastructure though that easily extends your range, but it's pretty spread out. I've lived in Missoula and while I liked all it offered, and I've been back often to visit family and go to shows, but to me it is just a huge sprawl of snarly traffic IMO! I've never been there that it didn't take closer to 30 mins to go from one place to another and just the cars and congestion made me crazy! Though, it is really crunchy...yes! Berkeley of the Rockies. I have family that lives there, and they really like it, but also complain of the traffic/big city feel it has now versus 10 years ago when they first moved there.
I've also lived in Bozeman, I think it's probably about on par with Helena. You get a lot of yuppie type folks living there that throw off the vibe of Bozeman to me. But, it is a very, very beautiful place to live! There is a pretty large, non-religious homeschooling group that is active there as well.