I've never done much night photography, now I'll be going on a trip and want to take some nighttime photos of the city, so we're talking reasonably bright cityscape.

I'm conflicted on what settings to use. I shoot film and will be using Portra 800. From what I've read it doesn't seem to make much sense to push process it, but feel free to opine on this.

I have a 50mm/1.4 which is my preferred option. I also have a 28mm/2.8 and a 100-300mm/5.6.
Can handheld pics come out good (tripod may not always be an option), and if so should I just use the 50mm wide open at 1/50 (or even try my luck at 1/30)?

If using a tripod, what would be my reference? Say I use the telephoto lens at f/8, what exposure time would I use, around a second?

I'd be really grateful for any examples as well, digital is fine even if you use higher ISO, I could still calculate it to 800 and see if I can open up wide enough.