Bubba; you say you can walk short distances; would it be possible to transport your chair in the back of a truck? No mods to the trailer probably be needed.
You don't mention your size, but from info given I assume you are less than 6 foot tall and have a hip width of about 30 inches and weigh about 300 pounds. you also don't mention a medical condition that requires the wheelchair.
A scooter might be a better alternative as most are lighter and "break down" for travel and still provide transportation.