mornings arent that bad. I forgot your flyin J class, at nights, they have a special lane for ppl who fly J. mornings though, not so much... :\
you just have to go through security, no customs to leave the country. You will get processed on the way back. 10am isnt too bad. i flew in around that time, was about 15 mins out before a normal person

Get there as early as possible... why? LOOOOOUUUUUNNNNGGGGEEEE...

if thats not required, id still get there 2 hours ahead just incase. The traffic into the airport can get pretty hectic :\ once your there, its pretty smooth.