Gene,
The awning was a DIY job, not too bad with some key help at times from my wife, cost a bit over $200. We found the upper rubber seal for the slide was utterly ineffective in sweeping water off the top of the slide, and the residual water would run off either side and soak the carpet on the floor. Plus all the added humidity and mold potential.
We carry no spare but do have AAA RV roadside service. I do have a bottle jack and a star wrench, and if necessary would rob one of the dualies to limp into a town. If we head to MX I will probably get a spare.
Towel racks - we use lots of 2-pronged brass coat hooks. Two on the outside of the wardrobe door, two on the outside and two on the inside of the bathroom door, and two on the front-of-vehicle inside bathroom wall. Plus one of those little wash cloth/drying racks with three pivoting arms that we put in the corner over the sink. All screws into the bathroom walls have been dredged in and covered with silicone sealant.