+1
Just a note. " Slugs"and "rifled slugs" are usually the same thing. Any brand slug at Wally World is likely what is known as a "Foster" slug, which has grooves cut on the side of it, which may or may not help accuracy. Essentially all are large, hollow based, thimble shaped soft lead projectiles that can be fired with varying degrees of accuracy in any suitable shotgun.
There are "sabot" slugs which are intended to be shot through rifled shotgun bbls or special shotguns intended for slug hunting for greater accuracy. These projectiles are also soft lead (I think) but encased in a sleeve or sabot, that fit the bore tighter and lend to more accuracy.
The slugs so aptly described such as the Brenneke's are a premium slug of hardened lead to better facilitate penetration in large critters like bears. I do not commonly see them for sale in the usual discount store ammo shelves.
You do not mention what kind of bears, but I am betting since you mention "quite a few around the cabin" that you are talking east coast, appalchian mountains, and typical black bear of 300 lbs or so. These can be hammered easily ( and have been for years) with conventional Foster type slugs.
Start talking grizzly and its a whole new game.