People frequently ask me why I don't get out into the backcountry more often to photograph wildlife.
The first reason is that my camera gear weighs about 40 pounds when all packed into my backpack. That weight is without water, food or a tripod. Don't get me wrong - I have certainly taken it all on hikes with me but my back is more appreciative to not hike with it.
And I have actually had more success finding wildlife from or near the road. Why? Because my car is the ideal blind. Most animals don't see the car as a threat. But if I open the door and step out they now see me, and humans are a threat to most animals.
So use your car as a blind. You will cause less stress on the wildlife and increase your chances of photographing wildlife less disturbed than on foot.