I was lucky enough to be out in the woods this weekend and thought I'd have a crack at the wigwam setup with a 4.5x3 DD.
Me laying down inside with plenty of room (I'm 5'10" or 1.8 m if you prefer)
The outside views. I didn't get the angles exactly right, but you can set this up on your own and there's sufficient height inside so you could change your clothes with reasonable ease.
(sorry - these came out wonky)