Want to temporarily stash RT on trailer in Vegas

I'm towing my bike along on a trip to the southwest and would like to stash it, still on its small purpose-built trailer if possible, in a secure location in the Las Vegas area for the 3rd week of Feb 2012. I need to drive the tow vehicle to SoCal for approx 1 week then return to Vegas for a planned bike ride with another MOA member from Canada for approx 5 days. Would need to leave tow vehicle and trailer in secure location while on bike trip. Would be happy to return similar favor when you're touring the Yellowstone Nat'l Park area in NW Wyoming where I live. Questions or suggestions welcome. Mobile# three one nine 321 two one 22 or pm me here. Thanks.