taking bike on vacation
You could try leaving the bike in your car, but covered with a dark blanket so that its not visible at night, it would be even better concealed if you took the wheels with you into your room at night as it could make the blankets profile flatter (handlebars turned to be inline with the frame).

If you dont mind taking it apart even more (pedals and wheels) you could even get a bike box to put it in, when you cover it with a dark covering then it would present a flat surface in your car which would be almost invisible in the dark.

Additionally, park near a street light or as close to the entrance as possible so its covered by the "security cameras" you mentioned.