You are allowed one carry on bag and one personal item, like a purse.
I travel every week. Things really didn't change in the US after the Christmas incident. You should be fine with your camera bag as long as you don't have big bottles of liquid. Now, coming in to the US from outside the country is more difficult. There is a specific list of what you can and can't carry on and there is extensive and secondary screening. I returned from Toronto a couple of weeks ago and it took a really long time. In the end I was able to bring my laptop bag with some items moved to my check in bag, and CPAP machine. I had to check my roller bag.
Here is the TSA website