Best mouse repellent available IMO is Fresh Cab.
Sold at farm and home stores, WalMart ... just google Fresh Cab.
It keeps mice out of tractor cabs, combine cabs etc. and put it in my camper for years, never had a mouse in it.
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.