We just stopped by the kiosk at Catalina State Park on the way home from Costco....about 11:30 a.m. Tucson time.
They do have sewer hook-ups in 24 sites, along with electric and water; 24 sites are electric and water only. There is no cable and no phone hook-ups.
Right now you can have any of the 48 sites.
It seems that they can't tell but seems "slow" this year.....
You could come in and if no full hook-up sites (electric, water, sewer) are available wait it out one night....tell the camp host you wish sewer and move the next morning.
Full hook-up sites are $19 a night.
70+ degree days or a little higher and our nights are in the 40's right now. Catalina State Park is in Oro Valley so our temps are just a little different than down in Tucson.