If you have to take just one lens, well, I guess the 10-22 since it's a fine lens that you can go wide with. I myself would want to take the 24-105 as well, in case you want to get a nice close shot at a reasonable distance/perspective, but that's me.
Well, I guess you went out last night -- how did it go?
I'm "late to the party", but I'll toss out some random thoughts, they may be handy for your next outing!
As to your settings, you have a good "starting point". Your time of exposure can vary with your subjects and the available light. For cityscapes with "good" lights, you may be fine with the 30-second exposure. Feel free to shoot and chimp though.
If you can, a "remote" shutter release (cable or wireless) is great for this type of thing. If you don't have one, then learn to use your in-camera tools -- the self-timer and mirror lock-up are very useful with or without a remote release. The key is to minimize your "hands-on" activity. And, this can be critical if you are shooting in the Bulb mode -- you can stand there with the remote release in hand rather than be hunched over holding the shutter button down (with whatever movement that may involve)!
Just my thoughts after-the-fact!