I see most people do two on each side, but one on each side seemed plenty secure to me. I also found a hitch pin to put on the little front post the cover sits over. This should work well enough for me.
I really wanted to paint
the tongue before attaching all this stuff to it but the directions say it's best to paint
at 70 degrees or higher, so that's going to have to wait. I wanted to get all the bungee cords off the front of my trailer right away though...
Next project up there will be a deck plate so I can access the propane
without taking the whole cover off.
Thanks for the help.