you realise very quickly you just can't get away with poor lookout/awareness when there's noone else there monitoring you on a radar screen.
As someone who learned at and has done most of his flying from a full ATC airfield you can take it from me that you still need eyes in the back of your head.
I've been doing a lot of flying from an a/g airfield since last year for various reasons and I would say your SA and lookout needs to be just the same whatever sort of airfield you fly into/from.