Left column is for full back (checked on to plane). Right column is day-pack carry-on.
Main Pack (checked in at airport)
Plane: carry-on small day pack (and day hikes)
Your valuables plus emergency stuff (in case lost pack)
enclose main pack in a secure 'net' bag (optional)
hiking sticks
extra pair of comfortable, light-weight shoes
3 pair hiking socks (& 2 pair thin inner socks if needed)
lightweight gators (keep crud out of boots)
2 long sleeve shirts & 2 short sleeve (fast drying, no wrinkle)
1 jacket: fleece or light-weight running/hiking top
wind breaker with hooded top. (bottoms, too). (rain proof)
light poncho (cover yourself & pack during storms)
2 pair pants (zip off bottoms). doubles as short pants.
1 lycra (tights). Adds essential layer.
3 underwear (not cotton)
light stocking cap
light gloves (warmth, breathable, durable)
2 mini-towels (~ 20"x20") of squeeze-dry material
candle and waterproof matches
rubber bands, mini-caribiners
spork (spoon/fork combo)
waist pack for day-hiking (optional, but really handy)
water-bottle(s) or hydration-bag (total 3 liters).
multi-purpose knife (with bottle opener, scissors, etc.)
zip-lock bags (for food, dirty/wet clothes, trail mix, etc.)
plastic shopping bag (not provided in their stores)
thin clothesline (nylon cord), mini-clothespins
small collapsible umbrella (sturdy to withstand winds)
optional: little photo book (with a few family photos, hobbies, etc.). fun to show to folks along the way.
wear primary hiking boots
hat (with large brim and ear/neck protection)
money/passport-belt (then, to keep dry, place these in a sandwich bag(s) -> passport, plane ticket/info, drivers license, credit card(s), cash, notes (emergency fraud #’s, itinerary, address-phone#’s)
drivers license
electronics: 220-110 universal plug. consider 3-way adapter & short extension cord.
reading glasses and good sun glasses !!!h
hostel sheet (bivey bag and inner liner | REI product).
pre-order Euro & Swiss Francs
camera/smart-phone & earbuds
pedometer (optional).
ear plugs
needle/thread, super glue & a little duct tape
hood lamp (or small, light LED light)
first aid (bandaids, tape, heel-slick (opt), neosporum, water-proof matches, etc.), and medicine (prescriptions, vitamins, ibuprofen, etc.)
toiletries - in sealed bag: toothbrush/paste, deodorant, razor, comb, file, etc.
Sun Screen
Log to record the trip (and pen/pencil, sticky notes)
paperback(s) to read (then discard)
travel book tear-outs and travel articles, maps, etc.
whistle (emergencies)
GPS
SPOT (location device)
Lay everything you plan on taking out on the floor (or table). Scrutinize each item and make sure it is necessary.
If not, throw it out. Leave 25% of the pack free space.
Pack items into multiple stuff bags. Bag for toiletries, underwear/socks, first-aid, misc Roll/stuff clothes into mesh bags.