Think “get off the ground” so you’re shooting into the dirt especially if you’re expecting short range shots.
This⬆️, especially if the terrain is flat. If your land is rolling or has ravines, just plan your shooting lanes accordingly.
I'd lean towards your .30/30 with 150gr bullets, but also consider using your slug guns with full-caliber slugs since smoothbores and sabots don't mix. Millions of deer have fallen to regular slugs at ranges up to 100 yards, and the Deerslayer was conceived for just such shooting. Order a selection of slugs from Midway or Grafs and see what your gun(s) like. The modern notion that only rifled slug barrels are worth using only applies to shooting past 100 yards. Be aware, however, that slugs can ricochet just like anything else, worse sometimes, so require the same caution as any other bullet. I like Brenneke slugs best, but Remington Fosters and Federal Tru-balls have shot pretty well in some guns too.
