I've got a buddy, a Navy vet, who is big in Patriot Guard in Arkansas. He's at most every mission in the state. He rides a Softail and pulls a trailer with the flags. He walks with a cane.
Why? He specifically stated that he doesn't have any trouble riding. Maybe he's like some of who don't want to give in and lower himself to a trike until it's absolutely necessary.
lower himself to a trike ? where have you been ? lots of people ride trikes that don't have to. they do it because it's fun and they handle well. to each their own, but no one is lowering themselfs to ride a trike (unless it's a honda). just kidding, before the flaming starts.