The biggest key to enjoying the hard-ticket parties is avoiding Main Street like the plague. People are jammed in wall-to-wall from before the party started, right through the fireworks. Fantasyland can also feel especially jammed early in the evening.
It also helps to go in with reasonable expectations. Pick your top three things you'd like to accomplish and let everything else you do that night be gravy.
Yes, the party is expensive. But for me, the character interactions, atmosphere, parade and fireworks make it totally worth it. My DH and I are even planning to attend two
MNSSHP this year because there's just so much to do!