RiverFisher, I commend your attitude and work ethic; I think it's great you want to spend your remaining working years with UPS.
That said, please be aware:
-- part-time positions within UPS have high turn-over rates.
-- getting up in the middle of the night, going to work, and unloading nearly 5,000 packages & dozens of bags from two 53' trailers (most conveyors reach less than 40' feet and the solutions beyond that are inadequate, and usually involve your feet) is tough. Equally as tough is loading 1,200 packages onto four package cars. Worse is scanning & loading 5,000 packages + several dozen bags into 53' trailers that have spent all afternoon under the hot, hot sun. As a new hire, don't expect an easier assignment.
-- most buildings have added many part-time package handling positions to handle the increased volume -- most of these jobs will not be retained beyond the peak season. Come January, upper management will have so much time on their hands they'll analyze how much has been spent on labor in Dec. (forgetting about revenue & profits), fume, and demand that productivity show heavy improvement. The end result is that there's often less jobs exiting peak than there were before peak. And preference for any vacant position will always go to the guys who did the job during peak.
-- In a center I worked in, only about two dozen part-timers -- out of a staffing of more than 500 -- worked both inside & driver helped. And most of those were people earning less than the helping wage. Further, when the building hired jumpers into part-time positions (which hasn't happened since the economy tanked), most didn't last. They're two different job types and success at one just doesn't translate into success at the other.
I wish you luck with your career.