Well lets see here, iffen I dont do the whole chair with wheels thing, and stick to just what's on the computer desk, then I can bring used q-tips, a bundle of horse hair, eye glass case, tooth brush, bottle of lemon juice, a bottle of JB scotch, and a can of diet pepsi. Unfortunately my computer desk is a table and is occupied mostly by the monitor and tv.
Now if we go what is in reach, I have the advantage of a small room in which everything is essentially in reach. So letsee, for guns a choice of either a Kimber, a single shot 12 guage, Hi-Point 9mm, or a GHK .45 Have 100 rnds of .45, and 50 rnds of 9, unfortunately no 12 guage shells (the durned store wont put out the buckshot til deer season). For knives well, about 12 khuks, 3 kampilans, 3 barongs, 9 kris, 1 pira, head axe, 3 bolo, and well ok Im losing count and suffice to say there is more than enough choice. Other miscellaneous gear: all my clothes, blankets, various books on history and weaponry, sharpening implements, nail-clippers, vitamins and other over the counter medicines, etc... Now if this was pre-party, there would be even more booze and knives in the room in easy reach.
So Im in the dessert trying to fight Zombies and make it to the rendevous spot. Since its five things to grab, I figure the stuff on me doesnt count, so I have my EDC a CRKT, lighter, smokes, and light coat so not too bad off from the get go. Ok, first scenario in which Im limited to the stuff on the desk, I guess Id bring the lemon juice, could try drinking it, the bottle of scotch (could also double as a weapon), can of diet pepsi, horse hair (I figure I could always use it as tinder for starting fires), and well then its a toss up between the tooth brush or used q-tips.
Second scenario in which I can reach stuff, well then of course the Kimber/ammo, a special kris just right for taking Zombie heads, oh lets stick with the lemon juice and scotch may be able to get some nutrition from that combo, and a towel (you should always bring a towel).
Oh well, the desert part really screws me, growing up in MN, dont have too much dessert experience. At least in a forest theres wood to make stuff out of, and a better chance for food and water. I figure the zombies arent the big concern in this situation, but the problem of finding water and nutrition. So barring running into one of you who can find water or food in the desert, Id be pretty dead after a few days, maybe more if I can move slow at night and avoid expending to much hydration fighting zombies, from dehydration.