If you can, request a MK view in Conch Key. It's a stunner.
We had one several years ago, and while you only saw the top spires of the castle, you were so close to the action, you could hear music and train whistles and, of course, SEE the fireworks from our balcony.
We also had a perfect spot for viewing the electrical pageant as it glided by every night.
Added bonus: you're right next to the boat dock. So, after a long day in the park, you take a 10 minute boat ride and then in under a minute, you're back in your room!

Very helpful.
Wherever you stay at the GF, enjoy. It's the prettiest resort on property, and the proximity to the Magic Kingdom makes it all the MORE magical.