Not the best place to see fireworks as the Inn is further up the valley surrounded by pisgah forest. (Lived/worked there 2 yrs) One of the overlooks lower down the parkway coming from Hwy 191 would be better option. You might also look towards downtown. If you have a handicap placard it might be possible to get a spot to view those if they are happening.
I'm sure you would be able to depending on where they are being set off of. And it is very wheelchair accessible
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