Which bike for Morocco?

[BDG]

Any body used the bigger bikes like KTM 950 or BMW 1150GS for pistes out in the desert such as the one from Merzouga to Zagora?

I've done this several times before on an XR400 so know what its like, and that much of the piste isn't sand, but we do enjoy playing about in the dunes for fun.

I'm off again at the end of the year with mates all on XR650, BMW 650, KTM 640 but am thinking of taking my KTM 950 this time rather than WR 450. I've ridden it on lots of rocky off road stuff in UK and the Alps but not sure how the big bikes cope with the sand? I know i won't get to the top of Erg Chebbi on the 950 so will give that a miss, and perfectly happy with the pistes in the Atlas on the 950, its just the sandy stuff.

Any experience on the bigger stuff in sand would be appreciated, especially as we're planning to do as much off road as possible rather than touring around on the road.

Thanks.