There are two types of regular travellers: those who try to live out of one bag and those who have given up trying. I’m still in the former camp. I have to travel a lot for work and I’m constantly frightened of losing my bags in transit and ending up in Uzbekistan or somewhere like that with only the clothes on my back for a week. So I try to pack as lightly as possible, and travel with only ONE bag, which I can take on a plane with me.
I found out a little while ago there is a debate in the world of carry-on luggage that boils down to one essential question: wheels or no-wheels? By this I mean wheels on the bottom of the bag. Wheels make it much easier to drag around with you, but the folk at www.onebag.com (a great site for the frequent traveller) argue otherwise. They say it adds more weight, is not so practical outside of an airport and additionally gives you less packing room. For those of you (like me) who can get obsessed about this kind of thing, check out this page http://www.onebag.com/wheeled-bags.html.
I travel with a bag from the people at Red Oxx (no, they aren’t paying me to say this either) www.redoxx.com. It’s sturdy. I’ve used it for a ten day trip. No wheels, and no regrets.