One of those self storage places works well. Most of them have a fenced in, locked and well lit yard with a 24 hour security system that you can park in. Most have 24 hour access so if get back late at night you can still get your vehicle. I have used them before without any problems. They are not very expensive for short-term outside storage in their yard. Be sure to call their 1-800 number rather than just walking in to their office. I have no idea why, but often you can get a better price from the 1-800 number than from the live person at the counter.