I have day hiked to Trail Camp many times in winter conditions. I have watched as people spend close to half hour trying to work out the block at the cables and the looked at the thigh deep trails towards Trail Crest.
I would not attempt it on the MMWT in full on winter conditions. Spring...yes. The snow has been consolidated and Trail Camp is more or less a walk up without having to haul snowshoes.
As for winter hiking, there are a few rules...
1. Do not end up on the 11 PM News or your local newspaper
2. Know how to navigate with a map, compass and/or gps
3. Do not be dependent on your cell phone for gps or mapping
4. Go out only with people whose decision making you trust
5. Take the tools necessary for your trip, do not worry about pack weight
6. Never go higher than you can safely descent
7. Have enough clothes with you to be able to spend the night at your highest planned elevation
8. Keep extra clothes and food in dry bags, dry = warm
9. Carry at least one headlight
10. Let family or friends know exactly where you are going...do not deviate from your planned itinerary.
