Hey, I'm not in an emergency situation, but I might have to travel soon by car. I don't have the money for a hotel and if I can't stay awake through a long drive, I'd like to know my options.

Just in case, I'm wondering about places where I can sleep in my car without being harassed.

General travel tips are appreciated too.

Edit - Thanks everyone for the advice! At the beginning, I was really anxious about taking a trip like this, but now I feel like I have a plan. It means a lot!