I'm installing a frost free silcock which will be pretty much at grade (I might even have to dig a little under it for the hose attachment!). I pretty much expect this to be covered in snow all winter, but don't really think that will be an issue, but I'm looking for feedback. I live in Yukon, Canada FYI.
I will of course disconnect the hose and make sure the silcock is drained. I'm debating in if winter I will bother draining the pipes as the silcock is 18" and my pipes will likely have insulation/heat tape and I have a heater in my crawl-space (overkill, but it gets -40 where I live sometimes, but not usually for more then a few days!).