Same situation here. I have my tickets in November and the client is releasing me end of October. My employer said it safe to travel as there will be contract paper (SOW and purchase order) between the Vendor and Client in H1B package. Having hard time to make a decision. Please update on your decision and what documents are you planning to carry with you during interview. What a shame that there are 148 views in 3 days but noone wants to provide suggestion.