It's largely guesswork. You say it's likely to only be a glancing blow.
From which direction should you expect the strongest winds? Trailers are designed to handle it best on the front, not the sides or rear. Can you turn the trailer to help with that? Will your house shelter it from predominant winds?
I Sat out Andrew on SW155th st. The eye passed just a couple miles south. I had my vehicles pointed to face into the wind, and they were both still there the next day, with damaged glass, and one was slid about 50' but it was still on my street.
If you have the option, take advantage of the wheels under the trailer, and take the family up to Charleston for the weekend. If that's not an option Tape the windows, expect the roof vents and skylights to be damaged, tape them as best you can, and have your insurance companies phone number handy. Remember Cell service may be spotty for the first week or two after a storm, so have those numbers available beforehand.