1

Have you looked at a map of eastern Morocco? Erfoud is located south of Er Rachidia, and definitely not between Fes and Marrakech.

Another desert option? Take Supratours from Marrakech or Fes to Merzouga. Ask your hotel there about arranging a desert tour.

2

From Fes you can take overnight Supratour bus, you are in Erg Chebbi at morning around 7AM. I suggest to take a camel trek first night and stay a second night in some accommodation, so you can enjoy Erg Chebbi, it is much to see there, not only sand dunes by camel.
Supratour take you right to Merzouga so forget Erfoud there it is nothing special to see. It is also far from Erg Chebbi, 50-60km, 1 hour approx by car.
But, three days for you trip from Fes to Marrakech via Erg Chebbi is not enough, you need at least 4 days -
first day at morning you are in Chebbi, afternoon you take camel trek into sand dunes with overnight there.
second day back from sand dunes and stay one night at the room.
third day by bus 8AM to for example Tinerhir and visit Todra Gorge and stay somewhere over night. Or if you are not interested of Todra you can go to Ouarzazate and visit Ait BenHaddou, overnight there.
fourth day to Marrakech.
Did I count right ? :)

3

Do as david and khamlia suggest.

4

Sounds good, Khamlia.

When I go again to Merzouga, maybe February (?), I will go alone, and stay for maybe a week in the peace and quiet of the dunes, walking every day.

I can't understand why so many people want to rush from one place to another. It's all Morocco!

5

For years I have struggled to find a way to express what David's just written above.

Wonderful! You should add it to your signature.

6

Thanks, Tim!

7

I understand why people want to rush around...Morocco is a fascinating country with so much to see...desert...mountains...small towns where you can see life going on much as it has for centuries...historic sites...even large vibrant cities where you take your life in your hands crossing the street. The rushing around is a vain attempt to see it all.

8

yes, that I think so too, that they want to see all possible, but forget that they miss much sense and feeling for the country. Unfortunately many of them have not so much time and plan to go to other countries too and there they make the same mistake. But such is our life style nowadays, even in the normal life at home they rush from home to job, to shops etc., as ants.

Sounds nice plan you have David, it is so silence there, quiet, tranquil, it cleans also the soul actually. When I am there I take also long promenades and so.