Hi Shazajo,
I'm afraid they are there all year round, I also hate the dam things (my son takes great delight in watching me squirm when watching an Indiana Jones film LOL) that's another story........anyways I only ever saw one in our apartment last year and he went for a swim down the loo.
I was told by an Australian that they (the bugs not Ozzies) hate cucumbers......and the skin poisons them...maybe that's why they stayed away, well it seemed to work......don't know......most hotels etc will give you a spray should you need one........or go to your local DIY store before coming away.....although best to check with airline or travel company about packing it in your luggage.
Just plain old common sense, which i am sure you have plenty of is to keep all your food and drink in the fridge.
Hope that helps