Yes,indeed Bay Area seniors (or anyone else) can camp out on Rob Hill, the second highest point in the Presidio. The site has been spiffed up lately and is now more fully equipped, including a restroom with hot running water. There are two campsites, each $100 a night and accommodating 30 people. Reservations are required.There is an online application which is non-refundable. No dogs, no alcohol. The site is heavy with history. The deAnza expedition tromped through here in 1776. Trails stream in every direction to the Bridge, Crissy Field and Baker Beach. With gas prices going nuts this summer, this glorious local campsite makes even more sense.