Just updated heading to include location and dates. Several folks can make it at least for a day.
I am going to be spending most of the month of February in the Phoenix area at three regional parks: Usery Mountain, McDowell Mountain, and Lake Pleasant. All have water and electric and are very scenic. They each have paved sites that are well spread apart. Cost is about $26/night.
Of the three, Lake Pleasant is the prettiest, but a long way from anything. Usery is Sonoran Desert and gorgeous, but it is also only a couple of miles from Mesa, AZ, so very convenient to things. Haven't been to McDowell yet.
Here is website for Maricopa County Regional Parks: http://www.maricopa.gov/parks/camping.aspx
Usery also has a group site for tents and RVs with no hookups. Need 6 to commit to this area, if anyone is interested.