Not much guiding with 4” of snow and ice over it lol!

It’s icky out up here.

Just a stake punch hole where that black spot is with some lure in it. Backing eliminates real estate and the smell is 100% out of their reach and has to be “earned”.

Thats as important as guiding IMO.

Never ever put the smell where they can (easily) get to it.

I use two for my cat sets, but that's because for an exposed walkthrough, you are trying to draw a cat over the trap. Ill have one lure on one side of the trap, and a different one on the other. Normally a gland lure and curiosity lure. The thinking behind that is the cat will check out the lure on one side, then want to check out the other sent as well which it will have to step on the trap to do so. Cats gets curious and bored quick, two scents keep then interested. The call lure is just to get them in the area of the set, because cats love skunk.

Ive used the same lure on both sides before and have caught cats but stopped after I got a trail cam video of a cat smelling one side for awhile, getting bored, then turning around and leaving.

But for grey fox or coyotes, I've never seen the purpose of more than one lure for flat style sets, and lure and bait for dirthole style sets.

Great info : CAT TRAPPER NV

It can go both ways. But most commercial lures have a number of ingredients, so they already have quite a number of different smells. In theory a top lure should have all the smells it needs without adding more. Theory isn't always reality, sometimes another smell can make the difference. . But on the other hand, the more smells the more chances one of them will trigger avoidance in a wary individual.

Personally I very seldom use more than one lure per set (Oftentimes one lure and scat and/or urine). I will make multiple sets with different individual lures rather than individual sets with multiple lures. Because I am sometimes dealing with wary/educated individuals. But the other way isn't wrong and may produce higher catch percentages per trap if you have a good population of unwary critters.

Bearcat2 you have stated some valid points that I certainly agree with.