As to the 5 gal bucket trapping, you don't need any fancy setup.
Simply have the bucket placed near a rough textured wall, be it brick, stone or rough wood.
Mice can not jump out of a 5 gal bucket!
Peanut butter or corn is good bait.
Once in the bucket feel free to dispose as you wish.
In our cottage (log cabin with more than a few 'gaps' here and there) we had a 5 gal bucket near the stone faced fireplace. Somehow some popcorn ended up in the bucket and we were waken by the thump thump of a mouse attempting to get out.
We then always left bucket there baited with peanut butter and it became a morning routine to dispose of mice.
My tally one winter was 36!