Neccesities----

make a lil care package( I loved these!)--
gas drops(store brands just the same!)
baby lotions-shampoos-body wash
wascloths
hooded towels

a pk of diapers
economy box of wipes--9.00!

Plain pk of white socks--like six pairs for 4 bucks at walmart

*or get a gift cert at babies r us or walmart
*or something for her--most ppl. Dont think to do that!

Would it be okay if I got her a little bath tub and put wipes, diapers, bottles, and some other stuff in it?

That would be a good gift! Make sure no one else bought her a tub first! Lol

All of the above suggestions were good. But I suggest if you get her clothes, get 3-6 months or 6-9 months sizes because I got a crap load in 0-3 and her didn't get to wear it all.....Lol. And they don't wear it long anyways. Also, a diaper pail maybe. Not necessarily a diaper genie. I have a safety first pail and it doesn't smell and you use regular garbage bags in ti instead of those expensive refills.