This picture was taken about two years ago after a morning of hiking near Las Vegas. I remember pushing effortlessly into full wheel and having little problem holding the pose (on a rock, none the less) while the picture was taken. While my form isn't exactly correct, I've always found it to be a gorgeous pose.
Now, I wouldn't even attempt wheel (not only could I not do it, but it wouldn't be safe), but do find that reverse table is a passable substitute. The form here is not ideal in the least, but then I'm 36 weeks pregnant and not going for ideal. I just want to maintain some strength and flexibility as I prepare for labor, birth and motherhood. Nothing comes without effort these days, but the very act of making the effort is part of the practice and part of accepting where I am and where I am going.