I'd be willing to bet at least one tire will blow out, since it has been sitting awhile. Maybe even all of them, if they are more than 4-5 years old. I'd want to have at least one good spare with me, but if the tires are old I'd just replace them all before even starting out.
Now, about that tow vehicle... How heavy is this trailer and what are you going to tow with? And what about light hook-ups?