Harleys are heavy. I used to own a BMW R1200RT. I rode with a local group here in Colorado that was brand-agnostic but most rode cruisers and most were HDs. I used to have friendly debates with the HD enthusiasts who complained that they couldn't hear my bike running. I reminded them that a comparable Harley Road King weighed 900+ pounds and made 89hp stock. The RT was 505 pounds and made over 100hp stock (the 2019 is 136hp). Different strokes. Anyway, as most have noted, the issue with getting a bike in the bed of a truck is, in off-road driving terms, an issue of approach angle. Rent a trailer. U-Haul has a vehicle hauling trailer that rents for about forty bucks a day. Be safe. Spend forty dollars.