I loved getting to work with a 501 (c) 6 when most of my previous non-profit work experience had been with 501 (c) 6's! The staff is also amazing and has helped me out along every step.
What I wish was different
I wish they were able to offer me a full time position so I could stay post-graduation! Other than that, there is nothing I would've changed.
Advice
Make notes as your are being taught how things run! You think you'll remember but you won't always.