I use my bike trailer a lot It is convenient.
However, I did make this towbar, designed to mount on a vintage Blackburn rack. Sorry, no photos of coupled bikes, you'll have to use your imagination.
Towbar.jpg
ThreePlates.jpg
Basis is one of these:
Used Delta Lockable Fork Mount Pickup Bed Truck Bike Bicycle Hitch Rack | eBay
Sunlite Bike Block Heavy-Duty QR Alloy Fork Mount Holder Pickup Truck Bed Rack | eBay
It towed ok. A little awkward. I carried the front wheel on my pack which was a bit awkward. I may try to figure out how to tie it to the frame. A lower mount might be nice, but it would need a special rack for that.
But, sometime I'll build a roof rack style rack to go into a bike trailer.