Eric,
there are two Airforums members in the Dover, DE area, and another member in the Bridgeville, DE area that offer "Courtesy Parking".
perhaps you could try reaching out to them for a place to park your trailer? and maybe they'd be good enough to pull you from Smyrna to their home, given that it's not very far? (comparatively, at least!)
if you want search for them, go up this page to "Community" and then "Members List", then click "Search Members" and "Advanced Search". then select "DE" from the State dropdown, and "Yes" from the Courtesy Parking dropdown, and finally "Search Now"
this might make your life much easier?
ymmv.