The tentative dates would be 9th March to 9th April 2015, I can't do earlier due to my brother's wedding and I can go few days after the wedding so the dates I have stated is looking good for me. Nothing is set in stone yet though, I also have done some research and boy, it is gonna be an easy one for me this time due to experience travelling in the USA and my dear friends!
My draft planning:
9th March - Fly to LAX from SYD.
Arrive same day (USA Time) in LAX, transfer flight to IND (Indianapolis Int'l airport) stay there three nights and then fly out to Washington D.C. on the 12th March 2015 stay at a family friend's residence for one week (7 nights).
Travel to NYC by bus or train (yet to confirm) from 19th March and stay with a friend there until 5th April 2015, while I am in NYC, may as well travel to Boston for few days while I am staying in NYC during this period of time.
5th April fly to San Francisco stay there for three nights before catching the bus back to Los Angeles where I'll be staying overnight before jetting back home to Sydney, Australia
However, this is just the beginning of a draft planning - if you feel the urge to object, please object and throw in a suggestion or two. All objections or ideas are welcome!