I'm 6'3 and I own a manual '14 forester.
I got the stick shift because it's plain more fun to drive. I'm happy with the decision. Also I've been getting really great gas milage - sometimes over estimated, depending on how I drive it of course.
Camping in the back of this car is not really a great idea for a couple reasons. At 6'3 you're really pushing it in terms of length. The back seats do not fold down completely flat; there is a hump. I've found I'm better off laying the driver's seat back and sleeping that way than trying to lie in the back; I bring a tent with me. But a couple times I've inflated my twin air mattress back there. It barely fits, but when I do that, it makes it possible to lie back there without the bump screwing me all up. It's not perfect, it doesn't lie down completely flat, kinda better to deflate it some so that you sink into it a bit. Need to scoot the front seats forward to make room. Perfect? not at all. In fact I wouldn't recommend it. But in a pinch it will work and I'll probably do it again if I ever find myself needing to spend the night in my car alone and don't want to have to pitch a tent.