Way to go Susan MN, great idea! Also look for were plowed snow is dumped, I mean if one is desperate then take advantage of the possibilities of the weather. As you already know, Dress Warm and stay dry. Oh, and be careful of that knee on hill's covered with snow and ice on sidewalks and streets but then again you already know these things.
Have fun detecting! Best of luck with the knee! I've had my left knee operated on two different time and both were successful. My usual summer back pack weight is 85 lbs at the start of a two week trip into wilderness country. Just do what the Doc tells you to do, do the therapy, take good care of it and it will take good care of you..........63bkpkr