What will the weather be like and how should I dress?
Casual, comfortable clothes are most appropriate. The hotel is air-conditioned so if that tends to make you chilly, you might want to bring a sweater/sweatshirt to the sessions. Shorts, jeans, khakis are all appropriate. Comfort is most important.
The tours of Vent Haven are typically quite warm. Kentucky in July tends to be hot with daytime temperatures typically ranging in the 80 degrees Fahrenheit. Although the museum buildings are air-conditioned, they are small and heat up fast with the large convention crowds. Dress to be hot for the tours.