I wont be blanketing them, when I ride in the winter its usually just a short, quiet bare back ride.
I think I'm leaning towards the slow feeder and paddock overnight (4pm-7am) with turnout as the weather dictates. The field has grass but, under the a lot of snow and being cold, I don't feel like it's enough for filling their bellies enough for longer turnout.
If it is very cold I will switch to free feed and all day paddock, but being the easy keepers they are I'll monitor and play by "feel".
Thanks for everyone's help!