Here is my take. While 'frequently broken into in Orlando' might have some truth, parking at a private hotel parking lot with gates and cameras is different. I like numbers and probabilities. Please define 'frequently'.
If you have good stuff in the car, in plain view, it is very tempting for a would be burglar. Break-ins are a crime of opportunity. Leave the car empty looking. Put your suitcases in the trunk. If no one knows it is there, they will pass by.
What one burglar is going to take 6 suitcases? If you didn't even want to carry them to your room, why would a thief carry them across town?
I say save yourself the hassle of taking up space in your room. Cheers.