Well, actually 3 questions. Thanks to everyone who is helping me decide on this....major...simple decision. 
question #1. At Washington DC Reagan airport on JB airlines, with 6 people, one in a wheelchair, do you think 30mins is enough time to get from 1 plane to another?
#2. How do you find out if you are expected to change planes, or if it is just a stop with no plane change. I was assuming (yeah I know, never assume), with only 30 mins between flights we would not be changing planes.
#3 Am I correct that we wouldn't have to change our checked luggage, that the airline does that. (please).
Thanks again for all you who are so knowledgable & willing to help!

question #1. At Washington DC Reagan airport on JB airlines, with 6 people, one in a wheelchair, do you think 30mins is enough time to get from 1 plane to another?
#2. How do you find out if you are expected to change planes, or if it is just a stop with no plane change. I was assuming (yeah I know, never assume), with only 30 mins between flights we would not be changing planes.
#3 Am I correct that we wouldn't have to change our checked luggage, that the airline does that. (please).
Thanks again for all you who are so knowledgable & willing to help!