It looks like I may be able to pull this off.  I called 9 storage locations in and around the area and found a CubeSmart in Murfreesboro, TN (I can go visit WOD while I'm there) with a 40ft outside parking spot.  All gated and secure.  The shortest time period they will rent for is 1 month.  But they are running a special for the first month, which is half off and then another promo means I can pay $73.05 for a secure parking location that is right off 24 on my way to Brentwood.  I confirmed that there are no hidden fees or issues to cancel on that Friday when I leave.  I can drop the trailer/jeep there on Monday and pick it up Fri morning to head to the park.  By driving to/from the meeting I will get about $285 in mileage reimbursement and even with a net of roughly $211 I think I will more than pay for my fuel expense for most of the entire trip.