I've always considered myself anti-pocket for the most part, but it turns out that I have quite a few!
Pack: Six Moon Designs Comet, 2005 model, long since discontinued but a "little brother" of their larger Starlite.
–side mesh pockets: yes, used for water bottle, lunch/snacks, fishing rod, tent (last may be moved inside to the top of the pack for the same reason as John D's, especially since I've acquired a cuben fiber tent).
–back mesh pocket: yes, for rain gear and (when not raining) drying wet socks
–small interior pocket at top of pack, for car key, documents, cash, cards: nice to have but not necessary since only needed the last day of the trip.
–internal pad pocket: Another "nice to have"–protects my insulated air pad from other pack contents and eliminates a stuff sack for same, but not really necessary.
–added hip belt pocket from MLD: for current day's map and odds and ends (sunscreen, bug dope, Body Glide for feet). This is handy, since built-in hip belt pockets weren't around when I bought the pack. Yes on this one. I don't know what I'd do with the map with built-in hip belt pockets, which are generally a lot smaller.
–shoulder strap pocket from ZPacks (added): for camera. Lets me get the camera out in a hurry without removing my pack, greatly speeding up the time needed between seeing what I want to photograph and taking the picture. Yes on this one, too.
No way would I put a shelter in the bottom of my pack! I want that tent up before I have to unpack in the pouring rain! I also use a pack cover (1 oz.) because my pack is my pillow, so I want at least the front dry so it won't soak the hood of my sleeping bag.