Hi Tracey
I done this tour May 09, this too was my first JY holiday. I had a fab time, you will enjoy it. I took couple pairs off jeans, crop trousers, crop Jeans and a couple off skirts as you can dress them up or down. Its pretty cas in USA. Weather in San fran is changeable, I took a light wind proof Jacket, and a couple of cardis too, Just wear layers really, the further you move up the coast it gets warmer. So Tees and vests will be good. Money side of things i spent a fair bit and i never got clothes, but i done the grand canyon and went to a show of my choice in Vegas which was pricey, but your on holiday. I took cash and travellers cheques, i would not use travellers cheques again not too bad in Vegas or paying for your trips. But i would take cash and a card next time. Hope this is of help have a fab time, which i am sure you will.
Claire