Let me ask what may be a dumb question. I am going out for the first time this weekend with my TC and, since I don't have a gray tank, I'll be draining the sink into a 5 gallon bucket. When I am lea...
If you dump tanks, it all ends up in the same place. I don't see where it would make any difference.
Just make sure you have enough capacity in your black tank for the gray water before you start dumping it in the toilet. Won't be much fun trying to sop up the overflow.