I was able to find this TSA website: http://www.tsa.gov/traveler-information/traveling-children
It gives some information about liquids and going through security, but I couldn't find anything on Delta's or TSA's website about strollers and carseats? I'm pretty sure you have to check the carseat, but what about a stroller? Can it be gate checked?
We have the uppababy cruz and do not own an umbrella stroller..