StellaRose,
Where are you planning on hiking? Crossing a mountain pass is somewhat different to a hike around Yosemite valley trails.
The guidelines for winter hiking are the same as any other hike, the only difference is you need to be prepared with a few more clothing options and less hours of daylight. Here are a few simple pointers;
- Make sure you let somebody knows your route and when you expect to be back, you may also want to leave a copy of your route in your car.
- Plan a realistic route, it is easy to over estimate you own fitness or abilities. When you get tired you are far more likely to make bad decisions.
- Check the weather forecast on the days leading up to you hike and just before you set off. Be prepared to cancel or re-route if the weather looks sketchy.
- Check with a local Ranger if possible, they are best positioned to offer help advice on routes and conditions.
- Take a map and compass and know how to use them.
- Track you progress and watch the time and weather. If you are making slow progress or the weather is closing in stop and evaluate your situation, there are will be many more days to hike so don't take unnecessary risks.
- If you think you may be lost, stop and stay calm and look for landmarks, often back tracking is a better option than forging on regardless.
- Take plenty of food and water, you need to keep you calorie intake up to stay warm. People often forget to drink when its cold and even mild dehydration affects your bodies ability to keep warm.
- Wear layers and remove and add them according to conditions and your level of physical exertion, you need to stay warm but you also want to try and avoid sweating.
- Don't assume your cell phone will work, even if you get into trouble and can call for help, it is likely to take time for any help to reach you.
- If you are planning a more adventurous hike you should consider being prepared to spend a night in the wilderness just in case.
- As a last resort you should carry some way of starting a fire.
Regarding the heated in-soles, I would recommend you spend the $125 on some good quality hiking boots and good wool socks. The batteries won't run out on these:-)
As Tom suggest, pick a nice easy route and enjoy