Is it necessary to get a tour guide along Petra or the offered 2-3 hours will be enough?

Kindly note that 2-3 hours tour guide, will cover Petra main trail: all area -from visitor center -basin area  (Restaurant area) starts with the Siq , the Treasury, Street of  facade, Theater, Royal Tombs,Great Temple Complex  and princess palace, later on you can walk all the way to Monastery by yourself if you want.

NB: Tour guide at Petra is optional and is not included on some tours, So check out your tour itinerary carefully before you proceed with your booking.