Ride Like A Pro course showed "patrolman" mount. Right hand on right handlebar, right foot on footpad, stand up and swing your left leg over. Bike did t even move. Me, 6' 3" so I can do it from the ground.
This is the way I mount my Ultra most of the time. I was shown this method from a friend while travelling across the country; he was shown it by a Sheriff. I had a tall seat bag on my passenger seat, using it as a backrest, & was having all kind of difficulty mounting from the low left side. He demonstrated the "patrolman" mount & I used it for the rest of the trip & beyond. Just be sure the handlebar is cranked over to the left, & that the bike is not on ground that leans low to the right. I tried it once when the bike was sitting on ground like that, & watched my side stand lift off the ground a tad as I mounted.