Plus his ducks fore his drills

• ducks: White trousers made of heavy cotton (duck) fabric

• drills: Khaki trousers made of heavy cotton (drill) fabric

• plus-fours: baggy trousers reaching below the knee

• place his ducks before his drills: appears to be a conflation of two idioms, "place his ducks in a row" (organize things well) and "place the cart before the horse" (do things in the wrong order, i.e. the opposite of "ducks in a row"), perhaps confused (or addled, as mentioned two lines above) because of drink