I know there is a forum for equipment, but I thought as rucksacks/travel sacks criteria varies depending on the country your in, it would be ok to add it to this one.
I'm off to Aus in October and I need to have a good idea of the type of backpack to use and what size. I suppose a big factor is the heat I'll be travelling in and how comfortable it will be carrying it, as well as the numerous other things i.e should it have a daybag attachment.
I've read on various threads people discussing the size of their luggage, I guess it depends on whether your backpacking or camping.. I'll be mainly staying in hostels so wont have all the equipment etc. So what sort of size do you guys recommend?
In numerous shops they've recommended the travel packs due to the advantages at airports, so if you've got any suggestions let me know.
I have got a 75 litre backpack with a detachable daypack and so far on both my RTW trips I have tried packing as little as possible but still end up with an almost completely full pack. I've only taken one pair of shoes as well for the whole trip and they are the ones that I wear when I'm walking with the pack, so I don't even have any shoes that are included in the contents of my pack. Others say that a 55L pack is enough to do them. I think it depends on what the size of your body frame is, how strong you are, if you plan on buying stuff along the way and don't plan on posting it back home etc. I couldn't imagine anything less than my trusty 75L pack with day pack. The pack is so cool, because it has lots of hidden pockets, a rain jacket which goes over the whole thing even when it has the daypack attached a bit to seperate things you don't want mixing with your clothes, a pocket for the power adaptors you need or in your case the one you'll need (assuming Australia is the only country you are visiting). It also has a pocket for putting things like a travel diary to keep it out of the clothes part. Getting something with lots of little pockets as well as the main part is also a good idea.
I think it really depends on your personalilty really.
Some prefer to get as big as possible because:
1. They feel that its easier to search for stuff
2. They want to bring extra clothes and so on
3. Allows you to get some stuff from a country and pack them in, save you the trouble of carrying them in hands
Some prefer to get a pack as small as possible because:
1. It restricts them from packing too much as it gets heavy for them.
2. Easy to bunk it around and so on.
How big you want, is really your personal preference. A 60L shld be more than enough if you are packing your stuffs in ziplocks.
When it comes to buying packs, be caution. DO NOT just buy a pack just because it looks nice, there's good compartments and its the size you want. The most important when it comes to buying a pack is to try a few different brands of packs with a substantial weight in them so to let you have a feel of to what extend the harness suits you. The most important part of the bag is the harness. Different packs have different composition of harness. Osprey may suit you but not me because I have a different back from you.
Some good brands will be Macpac, Osprey and to the high end will be A'rcteryx. Try all brands out, do not exclude any in the shop.
Happy choosing your packs.