The Texas Star Party, near Ft. Davis in west TX, is one of the first premier dark-sky observing events in the country. In the above photo you can see the Prude Guest Ranch where this week long event is held in April or May every year.
Notice McDonald Observatory can be seen on the mountain top in the top right.
Around 600 attend, and most are serious observers or imagers. The ranch protects the night sky and no white lights are allowed, and there is no driving after dark on the property.
The ranch has cabins, motel rooms, available for those who register early. RV hookups are available, but in all honesty I have to let you know that RV areas suffer from over crowding. The last couple of times we went we camped at the state park across the road from the star party.
Some years the skies are absolutely incredible. Other years there can be a lot of dust in the air and the skies suffer reduced transparency.
The Ranch is at 5,000 ft. elevation, and suffers very little light pollution. However, you are in the windy, rocky, dusty desert, and things will get dirty. The seeing is usually pretty rough, but in the best years the great transparency makes even small scopes perform like large ones, and the large scopes really earn their keep!
Expect hot days and cool/cold nights. The rainy season starts mid-May, so we favor the years when the star party is held early in the season.