Welcome Bonnie! I'm NOT familiar with either the "Love Bug" or VW Sportwagen. What does the VW's manual have to say about towing a trailer? If VW says it can tow a trailer, I expect VW would say HOW MUCH weight
it can SAFELY tow and, if there any restrictions you need to be aware of and comply with. If NOTHING is mentioned in the VW's Owners' Manual, I'd take that as VW's tacit admission that ANY towing is NOT recommended.
LOTS can go wrong here if you don't get everything right so, do your homework and, remember, pretty much ALL advice / opinions posted here are worth exactly what you paid for them
Again, WELCOME and, Good Luck!