" Need to pack more food, more water, a 2-person bivvy bag, and a way to start a fire in the rain."
Couple of things for the fire starter:
Road flares: you can simply cut a plug off most of them and torch it to start a fire.
Recycled approach: Use a paper egg carton and the fuzz from the lint trap in your dryer. Pack each dimple in the carton with dryer lint and, using old stubby candles, fill them up with wax. These really work well, BTW...
Alcohol based hand sanitizers work pretty good for starting a fire, too, Just run a line of sanitizer on what you want to burn, and torch it.
If you don't have matches and have your vehicle, your battery is going to be your easiest fire starting source, even if it somewhat 'dead'. A couple of pieces of light gauge wire from a speaker of other non essential item will work if you attach one to each side of the battery. Grab some kindling of any kind, loosely pile it up and run the two wires under it. Touch them together to generate a spark, blowing on the kindling at the same time.
Of course, if you are in this situation and are cold or wet, it is time to add basic Boy Scout starting fluid to the mix. Either open a gas line where it is convenient, or bled the EFI line, catching the gas in any sort of container or even soaking the kindling. Not exactly EPA or Go Green approved, but if you are sucking wind, that happy crap goes out the window very fast.
If you want to know more about fire starters of all kinds, commercial and homemade, take a look at this link:
http://www.ssrsi.org/ods/fire.htm
Another suggestion here: Your very best 'survival' books are going to be military survival books, from pretty much any country. The US Special Forces, Marine Recon, British SAS books are especially good as they all deal with survival in all kinds of situations and country, start out with the premise that you are pretty much F***'d to begin with in regard to gear, are simple and concisely written, deal with first aid, especially in regard to wounds and trauma, and are well worth the bucks you spend on them. Oh...and they happen to be written in English, too, which is a boon...
If you are serious about basic survival techniques, stop by Farris Survival on South Broadway just North of Hampden. They carry a huge range of survival books and offer survival training, something I don't teach anymore. Ed (Southpaw3) teaches these classes with a couple of other ex military friends, so contact him if you are interested in training. It may save your life or the life of someone you know...