I think your Corsair TT was built by General Coach of Canada.
They might have some old literature on your trailer, if you can find the ID numbers on the frame somewhere.
My best answer to your questions are to first take your van, fully loaded ready to go camping, to a public scale and determine exactly how much it weighs full of fuel, people, pets, hitch-head, etc. Then weight your trailer full of clothing, food, etc. you plan to take along. Only then can you know if your van can satisfactorily and safely tow your TT.
An excellent towing calculator is found here.
You might consider visiting the Vintage TT board of irv2.com. A great group of folks who help each other older trailers.