Here is a general checklist of items to consider when planning a winter camping trip:

1. Warm clothing and insulation: Make sure you have appropriate clothing to keep you warm in cold temperatures, including a good-quality winter coat, insulated pants, warm socks, and a hat. Layering is key, so bring extra clothes that you can put on or take off as needed.

2. Sleeping gear: A warm sleeping bag and a thermal mat are essential for staying warm at night. Consider using a four-season tent, which will be better insulated and more wind-resistant than a three-season tent.

3. Cooking and food: A camping stove, fuel, and cookware will be needed to prepare meals. Bring enough food to last for the duration of your trip, including high-energy snacks to keep you going during the day.

4. Hydration: Melted snow or ice can be used for drinking water, but it's wise to bring a water filtration or purification system in case the water source is not reliable.

5. Navigation and emergency equipment: A map, compass, and GPS device, as well as a fully-charged cell phone or a personal locator beacon (PLB) can be crucial in case of emergency.

6. Headlamp or flashlight and extra batteries.

7. First aid kit

8. Necessary permits: Make sure to check in with local authorities to determine if permits are needed and familiarize yourself with any regulations or guidelines you should follow while camping in the area.

9. Know the weather forecast and condition of the area, prepare accordingly before heading out.

10. Bring extra gear that could help on a winter camping such as: snowshoes, crampons, ice axe, extra gloves, a warm hat, a face mask.

It's also important to be prepared for the worst-case scenarios, such as getting lost or injured. Make sure that you have the necessary knowledge and skills to navigate in snowy terrain and to build a shelter if necessary.