Hawn is a lovely park just south of the city a few clicks.  It's tucked away into the trees with ample shade and options for backpacking, backcountry hiking.  The park is nice and sites are spaced out enough.  Not sure about cell service but had a site in the 2nd campground in the middle where there's a break in the trees.  I was able to use Starlink.  People were friendly and overall lovely park and experience.