I'm no expert. My opinion on the suit difficulties is based on the recent ars article on the subject of space rescue.

http://arstechnica.com/science/2014/02/the-audacious-rescue-...

"Ars consulted a number of sources to gauge the difficulty of donning spacesuits without any assistance from unsuited crew. Though none would speak on record, the consensus is that it would involve what was universally categorized as an extremely high degree of difficulty."