All cable locks cut the same, so if you aren't getting a NYC U-lock, get the lightest one with the reach to do what you want. If you don't have fenders, you can take the front wheel off and lock it with the rear or take it with you, even into your tent. A cable cutter is a pretty good-sized gadget that the average person is unlikely to carry. I'm not fond of keyed locks, being afraid of losing or having the key(s) stolen, so I use a combination lock.