Welcome to the club treebark. I'm sure everyone is welcome in the Subaru community and even if you didn't drive a Subaru you are welcome too, but it's obviously cooler if you come with a Subaru. I'm sure as long as you are equipped with snow tyres, are a respectful and responsible driver there shouldn't be any problem. These drives are to have a good time, meeting other enthusiasts and driving responsibly to give the Subaru a good reputation. Over the last few years, there had been issues with wreck less driving, tailgating, passing on blind curves ect., but it seems to have gotten better over the years and hopefully it will remain like this.
Not sure if I will be able to go on the drive, but have a great time and drive safely.
Happy New Years Eve from Australia,