I am doing it the other way around from what Karen suggested. Long AM short PM, DD has always loved her AM nap and waking her from it makes for a very crabby baby until the PM nap which is then restless at best.
We are up around 615am these days, 4 hrs 15 first A time, 2 hr nap, 4 hrs 20 second A time, CN, BT 8pm. Some days are great, others not so much... just the nature of the 2-1