Snow can be so tricky. I know you and others who frequent this site have more experience than me in snow, but it can really mess with you. Conditions are highly variable and the terrain can really get messed up visually; you know where you are but can't quite pin down something you are looking for. And when you are 2 separate parties, you can each be second guessing each other. I am not a gps guy in general. However, I can really see the benefit to having a good unit in the snow. You can set up primary meeting coordinates as well as backup spots in advance. I'm thinking at least 3 for unsure weather and 2 for nice weather.

BTW, sounds like you are doing fine to me. It's just that this trip stressed you out a bit. Just means you are a reliable partner.

sk