I know a lot of people don't want to pay for a plate mount but it is a good solution if you don't want to drill your bumper.
STILLEN No Drill License Plate Relocator
STILLEN No Drill License Plate Relocator 105465 | STILLEN
Had mine since July. no problems with install or removal. Personally, I don't want to give the nice law enforcement people any extra reason to notice me.