Are you thinking about having liability only, then insuring it only when you drive it? If you have other vehicles, then it should be no problem to add/remove the Jeep whenever you need. If you don't have a live agent that you know you can get ahold of and trust to do what you ask (like if you have to call 1-800 to make policy changes), then I might suggest calling a week ahead of when you want to take the ride out.