I have a major problem with large skunks digging many holes in my yard at night and sometimes even during the day. Does anyone know any non-chemical ways to eliminate grubs? I have trapped many of them but some won't go in traps. What are good foods to use as bait?

You really need a chemical treatment to do the job right and quickly. There are a few non-chemical options discussed here and a few on these pages, but you'll see they're iffy, time consuming and just not designed to quickly eradicate them.

I'm curious: Grubs don't usually attack healthy yards so I assume yours is healthy. Do you keep it that way without any chemicals?