In reply to jon_gill1:
We took three nights but did start at about 4pm on the first day after a missjudgement that meant we arrived at the base with no water. (There had been a natural spring nearby when my partner hiked to the base the Autumn before).
It was my first (only) El Cap route but I'd done The Prow on WC and my partner had a respectable ticklist from Squamish. We'd also just done the first 6 or 7 pitches of NA Wall before I got spooked so had got our eye in on aid as it were. LF felt very friendly after NA Wall!
From my memory most of the earlier bivis wouldn't be all that much fun without a protaledge. There's a pinnacle at the top of pitch 9(?) but from my recollection of uing the "poop tube" there it wasn't all that great to sleep on (we slept on the ledge at top of 8 and just fixed to 9 for the morning).
The ledge at pitch 14ish (it, or the next pitch had a name like Marty's mantel or something) was huge and we didn't use the ledge.
Thanksgiving ledge is also monster and you wouldn't need a ledge if you had to sleep there.
Hope that helps.