If he was afraid of the saddle he'd be throwing fits even when place on his back. He's learned how to get out of getting saddled. Use the lightest saddle you can (for your sake, not his). Hold your lead in your left hand giving him enough lead that you can use your hand to saddle him. Line yourself up in the saddle area and just start to lift it. If he moves away you have hold of his head so his back end will have to make larger circles. Remain in the saddle area and just follow him. I'd be surprised if he completes a circle because the way he is moving is tiring for him. Because you are walking forward, it's easy for you. When he stops, saddle him, cinch him, walk him around and remove it. Take a break if you wish then do this again. Do the same with mounting. Your lead rope will be the same as for saddling. Start by putting your foot in the stirrup. If he moves, again follow him and place your foot again. If he stands, then mount only until you are standing in the one stirrup and leaning a little over the saddle, then dismount. And repeat. Now do the other side. If your post is out in the open, have your lunge whip handy and slide his lead rope thro the ring. Take a good hold of the far end so that you are standing at about 45* from him. When he starts to pull back, hold the lead hard and wave the lunge whip near his hip. He may need a little tap but get him moving his butt. If he continues to pull move him faster, get those hind feet busy. As soon as he relaxes his pull, then you quickly relax your hold. In doing this he is learning that he can either stand still and relax or work his butt off.