Make sure you charge for the meeting time. My policy has been to hand over documentation and treat anything after that as premium rate consulting. Unless it's in a contract. Nothing to do with ill will, it's just business.
If it's ill will, they won't even get the documentation without paying through their teeth. Reputation is important, but so is peace of mind. My peace of mind can be soothed by $$. So I combine them. Having a rep for not doing work people won't pay you for is not a bad thing.
It's hard to complain about not getting something you refuse to pay for.