>>2705923Make sure everything is formatted and charged before the day. Backups are important
I mean if its a friend, you're not obliged to capture it like you were doing it for a customer. Just have fun, but let her enjoy herself, try not to be in her face. Also, get some family shots for her, 'cause they are always high up on the list.
Take a about 32/64gb of CF/SD and shoot away.
Only shoot important bits with DSLR, at least you have more control. Unless you're good in the darkroom. I shoot candid moments on a SLR with Delta 400. It's awesome to post clients a few prints as a gift after you hand them images.