Hey Oneday,
I feel for you man. I know EXACTLY where you're coming from. I was born into this religion and stuck in it until I moved away from my parents. Just like you, I worked mostly on the sound dept. I also worked on literature and passing the mics. I had to work on parts and go out on service. My dad as well is an elder, so just like you, I had to do all this for him. If I stopped going to the meetings, my dad would lose his status as elder. It was up to me to make sure that didn't happen. I didn't want to be responsible for that, so....I played the part of a good boy. It wasn't until last year when I finally got married to another witness who was also playing her part just like me, and moved out. Now my wife and I are out together and my dad can keep his fancy elder status no matter what I do.
You can have a serious talk with your dad and say pretty much everything you've said here on this board. Maybe they'll cut you some slack and let you step down as pioneer and privileges, but I'm sure some drama will unfold along with rumors and gossip throught the cong. I would advice you to move out on your own (preferably far away) first before you leave. It won't affect your dad's elder position. If you move far, you can give the excuse of changing congregations. This is the perfect time to fade. That's what I did, and although there is some drama, it's not as bad as if I would've done it when I was living with my parents.
We'll all be here for you so don't be afraid to ask us questions or ask for advice. Feel free to PM any of us too.