I've gone to Ocean Park for the past 23 summers, and it never ceases to amaze me the difference in atmosphere and area when you drive 5 minutes up the road to Old Orchard Beach.
Don't get me wrong, I love walking on the pier, browsing through the little shops and eating pier fries.
But I could never actually spend my vacation there.
Too many people.
I much prefer being on a beach that is way less crowded.