You definitely do not need a theme camp to bump it up to the next level.
Depending on your resources, you may want to join some type of group, theme camp or not, for a slightly easier time with shade, etc, but it's really not necessary.
Usually, when coming solo, you get to know your neighbors. Sometimes that ends up turning into an impromptu group "camping" together. Not always.
Sometimes you'll be "adopted" by a camp/group; ie be invited over a lot for hang out/food/beer/whatever time.
Regardless, coming solo is awesome. Make sure to bring all you need to survive in the desert for a week (which you should do, theme camp or not)...shade, water, shelter (tent), food, first aid, etc. Read the survival guide.