welcome to the forum! You are definitely on the right track in thinking hollistically. I know that anti-stress, exercise;walking, yoga, meditating, sun light, fresh air, eating well, and a good support team helps alleviate GERD symptoms. But, i'm not sure if doing all of these things will completely eradicate GERD in all of us. I have done all of those things mentioned above in the past achieving great results, but I was taking my meds at the same time. I tried discontinuing meds in the past to only experience the emergency room days afterwards.
I have met others who had reflux problems and put on meds and experienced neg. side effects, so discontinued use. Some of these same individuals no longer suffer reflux problems. Maybe, just stress, diet, exercise factors.....Puzzling!
I don't know what really gives, but I don't believe it hurts to try a hollistic approach if you can.