I used a Courbette AP saddle for years on many different horses. The deep seat and knee rolls help my stability going up and down hills. I had two Courbettes over 25 years, and I used to trail ride about an hour or two at a time. I just changed to a Thorowgood AP, for my mare's comfort.
If you're going on long trail sessions, camping out, you may want an endurance type english trail saddle, or an Aussie stock saddle, just to attach saddle bags and stuff.
I've tried a few western saddles but I can't feel the horse under me too well, it didn't feel secure enough.