Hi Riley,
I will echo what others have suggested - give it a try!
For me, I cut back on alcholic beverages because I didn't want there to be a chance that it would thin my blood to the point that it may develop complications with bleeding. This was simply due to the fact that my urologist kept reiterating that it was normal to see blood (brown or red) during urination while undergoing BCG. This said, I didn't have any signs of bleeding, and was probably being overly cautious.
My 6th treatment was right before Christmas, so with New Years Eve right around the corner, I welcomed the new year with several glasses of champagne and welcomed the tears of joy and apprehension that surfaced because of it.
I wish you and everyone here a Happy and CANCER-FREE New Year!