call around and ask...ask if they are handicapped accessible, what the length of stay is allowed, what is required while staying there, what resources they can offer you to find a way to be self sufficient, and if they can and will take you if you can get there.
Once you find a place that can and will accomodate you, lay out a plan. Pack what you need to take, plan a budget of food in the car and water, pack up the car and go...take the small breaks you need, to stretch your legs and rest, maybe plan your route for where you can make safe stops.
Dont leave anything behind that he can get ahold of to find out what route you are taking or what stops you are planning on taking or he will be able to find you and start manipulating/bullying you back...
figure out where 15 minutes will take you on the route and plan on a stop at a gas station or a parking lot along the way where you can pull over on the side out of the way to rest.
Even if the rests are 30 minutes long, you can do this if you put your mind and heart into it.
First call around and find a place, then plan out your route...
Keep us posted we do worry about you.
Kat