It would seem you have the correct mindset. You can only quit for yourself. Quitting isn't easy, or more people would do it. It takes a lot of effort to succeed. It starts with making that daily promise to the group that you will grow close with. I saw you post in August. That group will help you through some rough times, guarantee it.
As for the gas station question. I avoided them early on. When I went, I would just pay at the pump and not go in. But when you do go in the store, just tell the person behind the counter who has probably pulled down your usual worm dirt that you have quit and will not need that anymore. They will generally be happy to comply, and some good ones will even ask you about your quit when you come in.
The more people you get involved in your quit the better. Tell your friends, family, everyone. Hell, I've told complete strangers. It just feels good to know you have broken the chains.
As for roll call, don't stress if you mess it up. The only way to mess up roll is to not be on it.
If you ever have any questions or concerns post them here, somebody will be on and here to help.
