We use the stinkiest dryer sheets we can get our hands on. Brand isn't too important. If we can smell the unopened box from the end of the aisle that's the one we buy. Put at least one sheet in every cabinet, drawer, storage area, shelf - everywhere. Wearing gloves will keep your hands from smelling to high heaven for a couple of days.
No mice and no spiders in 20+ years. (We also remove all paper products when we put 'er into hibernation.)
IMHO brass wool is better than steel wool for plugging holes. Both work - but steel is more likely to rust.
2016 Roo 23IKSS / 2011 Tahoe
2011 Roo 21SS / 2011 Tahoe
2006 Bayside / 2006 4Runner
1999 SantaFe / 2001 Sienna
1967 Nimrod / 1998 Outback