We are staying in a Jerusalem hotel and are renting a car. We have been in Israel before and absolutely enjoyed our trip to the Dead Sea. This time we are planning to drive there ourselves vs taking a tour. Need advice regarding the best way to enjoy everything. We will not be visiting Masada or Ein Gedi but want to spend a whole day enjoying the water and spa. I have seen on some of the forums that it is possible to buy a day pass to one of the hotels. Any recommendations on a what hotel or spa to pick? I do not need luxury but a reasonable place where we can have lunch (kosher) and enjoy the water. We are coming in December so I understand that it might not be possible to go inside the Dead Sea hence the interest in the spa(separate beach not required).