[ModelA29]

Check your local A Club someone may have a closed trailer they will loan/rent you. If you borrow one check the brakes, bearings and tire dates before setting out. If the tires are older than 6 years buy the guy a new set for loaning you his trailer.
If you haul it open and expect to exceed 60 mph I'd cover at least the roof and wrap ducttape around it just below the visor and again just above the cowl. High speed air getting under the top material could cause real problems.
Here is a 28 Tudor that the top was pulled up at the front - a 75 mph trip on a flatbed tow truck was the suspect.