Re: all being well
There is an expression "God willing and the creeks don't rise." It's extremely colloquial. If God wills it to be (the equivalent of "Inshallah"), and no natural disasters occur, like floods that make the creeks rise and make the roads impassable, we will do {whatever}. It's pretty unlikely that God would have an opinion on whether we should so something and take personal actions to stop us, and it's pretty unlikely that a natural disaster would come suddently and prevent it, so the overall meaning is "Yes, that is my plan, (but you never know when something unexpected may prevent a plan from being carried out)."
So, you'll be at the party on Saturday?
Sure, God willing and the creeks don't rise.
Sure, if nothing unexpected happens
Sure, if all goes goes well.
Sure, I'm certainly planning to come.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.