What are some of the best astronomy gatherings in the USA? I'm part of a local astronomy club but the results from that have been vastly underwhelming with a membership count of around 50-200 active people at any given time. All that being said- I guess my question is for 2019 what are the biggest and most informative gatherings in terms of astronomy? Anything you know of from lectures to imaging to stargazing would be wonderful.

More specifically:
I was considering spending the 250 dollars to go to the Northeast Astronomy Forum this April 4th and 5th and the Northeast Astro Imaging Conference. It seems to be one of the larger scale events that happens anually. Is this a good event for beginners? Heres a link to their site:

http://www.rocklandastronomy.com/neaf.html

http://www.rocklandastronomy.com/neaic.html

If youve been Id love to hear from you. If this is off-topic I apologize, but the only other place I had to ask was our clubs forum and it has virtually no traffic.
NEAF is pretty big (and probably the biggest).  There's also Southern California Astronomy Expo (SCAE).  

For observing, there is the Texas Star Party in west Texas.  There is the Winter Star Party in the Florida Keys (that site for that event was severely damaged by a hurricane a couple of years ago, had to relocate up-state, but are now back in the keys.  This past year the had to limit attendees because the camp wasn't fully restored.

A little closer to home for you (in Pennsylvania)... is the Cherry Springs Star Party (there is also the Black Forest Star Party at the same park ... different months).