Hi Musket,
As an occasional sufferer and camper, don't forget the other suggestions - avoid foods that contribute (coffee, chocolate, tomato sauce, sigh). For me I find Zantac more helpful than Prilosec, etc. maybe Zantac will be back on the market by then.

I think it's hard to get the back elevated sleeping on the ground, but I found a cot to be a blessing for car camping. Good luck with the inflatable pillow!