you're mainly going to worry about your steering column and maybe the radio. i have done this countless times. while moving i stay relatively dry. even with no doors or plastic windows. i don't worry about the seats or anything like that. they will dry out and be just fine. oh i also have a marine radio just incase.
2003 Rubicon, 4.0L, 5SPD, Custom 4.75" lift, 33" MT Baja Claws
1999 SE, 2.5L, 5SPD, sold it
PM me for wheeling in and around Northern Illinois