What would be your recommendation for the length of time this sits on the cookies? It will not be presented until our October meeting which will be near the end of October.
Would you carbonate at a normal dunkelweizen level when it is bottled?
I think you're going to have to let taste determine how long to let it sit. You will probably get a secondary fermentation from the sugars in the cookies, so once that settles down start tasting every couple of days.
As far as carbonation levels go, I'm on the fence on that one. For all my weizens I carb to 3 volumes (and I'm starting to slowly stockpile proper german hefe bottles so I can push that even higher in the future). But this is sort of at the crossroads of a spiced ale and a dunkelweizen. For a spiced ale, I'd probably want to shoot for the lower 2's. Are you carbing off a keg or in bottles? Maybe try some at like 2.2 and some at 3 volumes to see which you like better.