Also use a 5/16 drill and drill all the way through both plastic end caps on the bumper. Then drop a 5 inch long 1/4 bolt through as a pin to keep the caps from flying off. I carry my hose in the bumper, the elbow, gloves, chemical, etc in a tupperware bin.
There is a Facebook Hummingbird Group with lots of good conversation.
https://www.facebook.com/groups/Humm...?ref=bookmarks