I think it's a fun thing to do at least once. The view of the fireworks is better in the parks, I agree. You don't have to order 3 courses and spend a ton of money. You could go for drinks when they open, save your receipt, and come back later to watch the fireworks, or make your adr for dessert, or apps and drinks, etc. I would look at the menu and see what you would order and see if that price would be worth it to you.