Hey Vimal, There are a plethora of desert camps in Jaisalmer. I stayed in Oasis Camp, Sam years back and I remember liking it. I have attached some of them that you can check out!
So there are a lot of camp all around jaisalmer ( dessert camps to be precise). you could Google it up. I stayed at oasis coz the people on the internet suggested it
If you want to camp on your own on the desert make sure you talk to some local guide and confirm it is permissible or not. They will be aware of the do's and dont's and also the safety involved in camping on your own