Don't bring unnecessary gadgets with you when you're heading into the wilderness, especially those that require batteries or need to be hooked up to your car. If you have a sleeping pad or air mattress that needs to be inflated, use a foot pump. Instead of bringing along a radio or portable DVD player, listen to the sounds of nature or bring a book. Not only will you be technology-free, but you'll also have a lighter backpack.
The two exceptions: a flashlight and a cell phone. Bring a crankable or shakable flashlight so it won't lose charge, and always keep that cell phone handy just in case of an emergency.