See below the list of excursions I have been part of.
I am usually not a fan of pre-organized tours as I like my freedom while travelling and I like to have my own timings. The list below is from companies that will organise a tour for you but leaving some free time and let you take some decisions on the trip.
Morocco - Desert road trip
I have been on a 3 days / 2 nights excursion in the desert with GrayLine.
Below is a series of excursions that GayLIne offers in Morocco. Also feel free to contact me if you have any other questions.