winter trips

yo. got a launch date for the 4th of december... what's it like that time of year? what are the rapids like? air/water temps? crowds? sunsets? animal life? dry suits needed? anyone got some boats they want to lend me or recieve compensation for letting me use? suggestions? hikes to take...

I am looking for some info on side creeks and getting water to filter in january and part of feb........ Does anyone have prior trips though the grand(in winter months) that remember how much the little creeks were running? how often did you refill? I am willing to refill everyother day or...