Getting there at 7:50 then *not waiting in line* does not guarantee you a later cut. If you go stand by the lake at 7:50 cuz it's nicer there, you cannot then, at 8:58 when the park is opening, walk up to the front, shove past people, and insist you are due to get in first cuz you were there first. Likewise if you go early and go eat, you are not waiting in line. You *may* get in before the others if the CMs happen to be lackadaisical about enforcing the line jumping (they usually are), but you are definitely not entitled to do so by some right.
If you don't want to be standing in line but still be "in line" there is a system for that. It's called FastPass!