This leads to my next tip!
3. Shoot in RAW format. If you are questioning your ability to make a good exposure, and don't want to risk anything, turn your camera file setting to shoot in RAW, or RAW + JPEG. This will give you the file that has all the information you need to bring back detail in your snow, just in case you do lose details in your crazy bright snowy scene. If you have editing software such as Photoshop, you can tone those areas down when you edit your photos.