Miscellaneous: If you have a large group and are planning to rent more than one car – it is very important to pack a set of walkie-talkies! Locals are not shy when driving and your group will get separated within the first two minutes. We had to drive two cars for about 10 hours and these were lifesavers!
Clothing/Shoes/Weather Gear: In general, everything imported (made outside of Mexico) is very expensive here. More expensive than if purchased back home. Things that are made in Mexico can be good deals here, but don't come here looking for bargains in clothing. Clothes here are either cheap and crappy or nice and very expensive. Same goes for shoes, though you can find some ok shoes that are made in Mexico for a good price. Also, save your shorts for the beach. No one really wears them on the streets here. Bring some nice clothes if you are going to nice restaurants as most men will wear a jacket for dinner.
Luggage and bags:
Don't forget to bring a jacket when in Mexico City or anywhere in the mountains, it can get quite cold as it is high.
Clothing/Shoes/Weather Gear: Good walking shoes are a must, the cobblestones are uneven. There are holes in the streets and sidewalks so always look down when you walk. One woman tripped and was lucky to not hurt herself.
Toiletries and Medical Supplies: I don't leave home without my Pepto Bismol.
Clothing/Shoes/Weather Gear: Piece of cloth used in parts of Africa and Asia. Can double as towel, beach towel, dressing gown, pillow and table cloth.
Clothing/Shoes/Weather Gear: Takes virtually no space in your backpack, and can be very nice. Women may have problems if they are too revealing.
Some EXTRA STUFF. Well, pick the ones you like/need, and leave the rest at home.
Don't carry items you don't need!
Clothing/Shoes/Weather Gear: In really cold climates these are a must. A thin pair of cotton or light wool MITTENS takes up virtually zero space. The ones with grips on the palms and fingers are the best.
If you go to Mexico City in summer you can just skip this list.
Only if the temperature is well below freezing.
Clothing/Shoes/Weather Gear: Buy one or two pairs of very good quality, and be sure the pockets are tight enough to give pickpockets a hard time. Bring JEANS, but leave them at home in case you're going to a really hot place.
Clothing/Shoes/Weather Gear: Pretty impossible to be without, unless you just use thin shirts. You can buy them cheaply along the road.