We visited the Biltmore Estate the last week in July 07. The estate mansion was remarkable to see. The weather was sweltering outside. However, the estate rooms had large fans blowing which helped during our self guided tour. I highly recommend using the audio headset if you are self touring. Also, in the summer months make sure and go when the doors open around 9 am to avoid the crowds and heat. The outdoor concert we attended on the grounds was excellent! Quite the mountain setting all around. The flowers and gardens are beautiful at the Biltmore. The Stable restaurant was very good. You must visit the Winery on the grounds and buy a bottle of the sparkling Biltmore Grape Juice!
We stayed at the Fairfield Inn nearby.