That is a nasty tear .........
You could just jack up the bumper, so the cracked part comes together, place two metal straps behind it, drill holes through the straps and bumper, put in bolts. Drill holes in the gravel pan, zip tie it up into place. Fill in with bondo, sand and paint with rattle can.
OR, call your insurance and have it fixed proper ......
The next time you go coon hunting, I suggest you use a coonhound and a rifle..........
humfrz