Sossusvlei is the general area of dunes where we go to see the dunes. The famous dune belt is best observed here with Big Daddy as one of its most famous dunes. Within the Sossusvlei area is Dead Vlei and also the Sesriem Canyon. So yes, when you are going to Sossusvlei, you are bound to visit Dead Vlei. Sesriem Canyon is a bit out of the way and you need to ask to see this area otherwise you will miss it. As with so many other places in Namibia, these areas are best observed in the very early morning hours or late afternoon just before sunset.
Places to stay at there are plenty of. I have uploaded the photos of one of the may lodges in this area – Little Kulala. But there are literally a place for every budget.