Would you recommend doing this? Who would I book this through? Thanks

We did this a few years ago and I can't remember who we booked it with. It was beautiful. We loved the valley and the scenery. I would do it again.

Don't do it unless you absolutely want one of the most beautiful horseback rides of your life. I mean, really, who wants to see a black sand beach from afar, or native flowers, vegetation, waterfalls, incredible views? Nah...OK, sorry, just had to add some humor...YOU'VE GOT TO DO IT! It's wonderful! Aloooooooooha! \/

Oh man, My husband, myself, my four kids, and our babysitter all did this trail ride. It was the BEST, it was like being in Shangri-La. It is the real, untouched Hawaii, and you will never forget this ride. You have to do it, really. When you go, tell the wild horses hi from me.
I think there are only two stables that offer rides there. I'll try to find out which one we went with, they were great, and get back to you.

did anyone have any reccomendation on either of the tour companies. neither the wife or i have ridden b4

Here's the one we went with:
http://www.naalapastables.com/waipio.html
Hope you have a great time.