I have a higher power......
I just don't call him/her God. The symbol of my higher power is a tree. It's worked for me 15+ years. I go regularly to AA meetings because denial is always perched on my shoulder. My sponsor is an athiest (21 years).
Remember: the only requirement for membership is a desire to stay sober. Everything else is a suggestion. Another suggestion I heard in early sobriety: take what you need, leave the rest behind.