I ride with lots of folks who trail ride in snaffles. Simple O or D ring snaffles. I would ride The Biscuit in one if he responded well - and one day he will. His trainer is working with him on that. He was rode in REALLY harsh bits before I got him and he can be hard to put the brakes on at times but he is getting where he responds so much better.
I am with everyone else. If you horse is a happy camper - ride in what you have.