Grouse, sorry was whittle we just ran past a cross, so I got confused.
I only tend to wear a wetsuit from November through to March, but I only paddle on Shallow'ish water. When I say shallow I mean rivers and canals on the weaver were I train I would be well over my head but its not as deep as say a resevoir might be in the middle. Due to it being shallow and quite close to the banks it does tend to stay quite warm until the winter months. I did fall in early november without a wetsuit but I kept moving once back in the boat and was fine. I only felt the cold on the wet clothes (helly and trackster) once I was putting the boat away.
I do tend to fall in on a regular basis all year round but I'm fine in the wetsuit on december nights. I was reallly shocked the club trained through winter and very scared at first but its not that bad its a little like running the fells at night.
I cant speak for reservoirs they could be a whole new ball game. They could be freezing in the middle. Its sometimes a question of how quickly you can get back on the boat and paddling/moving again.
I have special gloves for the winter months called pogies they are like oven gloves and allow you to twist the paddle whereas gloves would not allow this.
http://www.canoesandkayaks.co.uk/pro...nt_Pogies_Palm
It really depends on how tippy the boat is and whether they plan to carry on paddling through winter.