Baby wash of some type, lotion if you want (I never used this for DD1, I got sweet almond oil and massaged her at night).
Never really used baby powder either. I used the family wash cloths and towels.
And I bathe my kids in the kitchen sink until their almost a year old. When they're infants I just stick this in the bottom of the sink for support:
http://www.toysrus.com/product/index...251&cp=2256088
This thing is nice because it's spongy you can roll it up and pack it for travel very simply, AND you can give baby a bath pretty much anywhere... bottom of a shower, a bathtub, a kitchen sink, even just in a bucket if you HAD to

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