A blind set using the entry or hole for bait. Cover it with a coni if ethical, a double door either the advanced, a comstock, a traditional trip pan they all work fine. I T stake it to make it difficult to raise of the hole.
If a blind set isn't an option I clean the trap unless its last job was a groundhog. If I am going to use cantilope, cabbage or any other fruit or veg I sprinkle it with salt as it preserves the freshness. I also like to cover the trap because the shade keeps the food fresh longer and it makes the ground hog look better if some one sees him in the trap. Sweet feed for cattle or horses is a great ground hog attractant. If I use a lure I use jamesons formula one and his trailing scent. I also like pro line sweet sabotage but it is very atractive to non target coons and squirrels. I also save ground hog poop from previous catches to put in the trap.
When I catch a ground hog I transfer him so I can keep using that trap on site.
A silk flower with formula one holds up well.

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