It is perfectly possible and easy to take the local ferry across the Nile from Luxor to the West bank.
Use the map in your guidebook, and don't listen to any of the touts trying to tell you where the ferry is as they will undoubtedly take you to a private boat and charge you far more than the 1LE the trip should cost on the public ferry.
It is possible to reach Mortuary Temple of Hatshepsut by bus or by car. Parking and entrance in Djeser-Djeseru are on the distance about a kilometer from the Temple. This distance can be overcome on foot. However the heat does not allow to make it with pleasure.
Therefore some car-wagons go between the central entrance and the place where survey of the Temple begins. Travel is free-of-charge and takes several minutes.
You may watch my 2 min 21 sec VIDEO-Clip on my personal YouTube channel: Egypt Luxor Bazaar and Road to the Hatshepsut Temple 2007
Luxor is situated on the East Bank of the Nile. Several years ago and in ancient times you could get there only by boat crossing the Nile. Access to the West Bank is now easy to arrange.
There is now a new road bridge over the Nile, some 7 km south of Luxor main city. Many package tourists now get to the West Bank by buses.
You may watch my 1 min 45 sec VIDEO-Clip on my personal YouTube channel: Egypt Road to the Hatshepsut Temple 2007