In reply to Blackmud:
You have a point. The line between an extraordinarily rich and challenging adventure and a plain old bad idea is sometimes quite blurred, and specifically the plateau is an area where it is very easy to step across the line without it being obvious. As numerous tragic events have shown, even recently, to fit, well equipped, and experienced people.
In answer to the OP's question, if they are absolutely hell bent on doing this Buffalo will probably shave a few percent off the risk over the alternatives - but only if they are uninjured.
However I would personally put trips in Winter to the plateau at night 'just to test survival skills' on an unacceptably high risk list, especially if solo. I don't know how old the OP is and I'm aware I sound like a pompous old fart but I'd get a few more years of general hill experience in first - unexpected epics will come rolling around without seeking them out. Either way, stay safe and have fun.
b