Only if you have a Priority Seating time at the California Grill restraurant at the top of the Contemporary Resort. There's a public observation deck lower down the CR, but keep in mind that there's going to be tons of people with the same idea as you. The beach at the Poly is also another good vantage point, but it's my understanding that unless you're staying there or are eating at Ohana you'll likely be outta luck. The beach area there is for resort guests only and I've heard that the 4th of July is one of the only times that they enforce that policy... again, because of the masses of people wanting a view of the MK fireworks that evening.