Set a fake castor mound with a foot trap. Trap untouched, but mound flattened out. Piled it back up, added a twig of more Backbreaker. How many times do you think the beaver will return before ignoring it? Obviously hoping for only one more time with good foot placement. And if it ignores that set, will it work the same set down the bank?

Try it again with same lure....same set....add another trap.

If it don't work....make a new set nearby with sac oil only.

I rarely set a big fake mound. It’s overrated. I kick in a pocket nearby and confine their foot placement to the “ inside “ rather than the huge outside of a target area.

I see guys wasting time making a giant sexy,showy,gaudy,eye appeal mound…wasting time and energy…..

I don't make a lot of fake castor mound sets, a lot of times if I am making a 'castor set' I simply find an indentation, usually where the beaver are already using to get out of the water, take a dab of castor on a stick, and poke it in the ground a foot or two from the water, set a trap where the beaver will exit the water, and splash some water on it, If I do make an actual castor mound, I take a double handful of mud and/or leaves, scooped off the bottom. Slap that on the ground, put some castor on it, and splash water on it. In either case I will often rub my foot back and forth three or four times, where I want the beaver to exit, before I splash the water, to slick it up like beaver have been climbing out there. The mound takes maybe thirty seconds longer if there is soft mud and leaves at the site. And if there isn't, I don't even consider bothering with a mound.

For ADC, I use a lot of sets with no lure or anything to attract. I try and set where they’re already goung. Now I find myself rarely using lure any time of the year. If they’re already going there, why add a lure?
The lure and other tricks come out if I run into trouble. Then the game gets personal and money is no barrier to success……lol

I have done both what bearcat2 and Shakey have described but have also set a fake castor mound the first time around along with the scented castor mounds I make. I usually don't like to use lure on my first go around but If I see freshly made castor mounds I'll set traps at the existing ones IF the terrain allows me. Spring trapping problem beaver is when I'll make a fake mound no lure along with my scented castor mounds and they work pretty well, I have also transplanted an already existing beaver made castor mound to where I could create a set. It all works you just gotta kind of know the beaver's habits. Oil sac like Swamp mentioned is a killer on the fake mounds, the existing mounds and the sets like Les has described.
A very under used attractor in most trappers books.

He'll keep coming back.

I would suggest however picking spots where you can have more control over the beaver so his approach/exit is more forced.