I am a fequent traveler but new to the credit card churns. I am planning a trip for a family of 5 to Washington DC. I will fly out of New Orleans. I was hoping for some advice on which cards would be the best to get started. Here is a little about me. I am silver on US Airways and platinum with Marriott. I already have the US Airways Mastercard with Barclays and the Marriott Chase card. Any advice would be greatly appreciated.