I started my Fuji (XT10) life also with just a 35/f2 so my thoughts are probably quite applicable. Even more so because I wanted to get a new lens before heading to Cuba last year, so I was in almost exactly the same position.
I plumped for the 14/f2.8 prime and took that and the 35/f2 combo to Cuba. It worked great, but that was last Feb and having been on a few more holidays I was getting annoyed (read: girlfriend was also getting annoyed!) with constantly having to try and judge where I was, whether I'd be shooting something landscape-y, or doing some street/portraiture. Then having to stop and swap all the time.
After doing the same in Greece in May, I decided to ditch the 14mm prime and buy the 18-55. My feeling was that a lot of my shooting is done on holiday, and having the ability to tack on a single lens for all/most scenarios just makes for a better experience. Sure, if you're going out to shoot landscapes at 4am specifically -- there's a lens for that.
Especially given you're a (relative) beginner I would heartily suggest the 18-55 for the freedom to shoot whatever you want without worrying too much about swapping lenses etc, you can concentrate on other stuff and more importantly enjoy your holiday a bit more. The 35mm is great to get out for the odd portrait etc when you've got time, the odd bit of street photography for example. But you'll do very well with the 18-55.
I certainly wouldn't get the 23 to go with the 35, they're too similar. Same with the 50. Primes are very nice but I feel they're held in overly-high regard online, just bear that in mind. People would have you think you need a prime for all occasions, whereas in reality that's totally excessive for lugging around on your holidays.
The 18-55 is very well reviewed too.
