You could always donate the wine and then win the auction yourself, then it's still for your consumption, and the ATF wouldn't care... Oh, that's probably not the point, even if you wanted the tax deduction.
I don't know if the ATF would be against this (and how many ATF agents do you have at your church?), but how about an alternative if the consensus it to not do it. The best is to offer a wine tasting at your place with you, and therefore the wine is still for your consumption. Once someone wins, you can discuss with them exactly how much tasting they want to do with you.
Just an idea, though there may be other "variations on a theme" there to stay within the letter of the law.
Good luck, and where's the auction? If it was near Portland, I'd consider going just for this lot!
Rob