There's a lot less to go wrong and need fixing on an SS/FG, so it's just a spare tube, patch kit, and 3wrencho in a saddle wedge, plus a frame pump on mine.
P.S. My FG does have a bottle cage, but I pretty much never bring a bottle on that bike. Water is obviously available in town, and there are lots of watering holes along the trails and other routes out of town around here. YMMV.