Ya gotta know the boats schedules and places that the wake will break. Find a friend who has a boat to take you out on and chase a tanker. When you see it coming and you are waiting at the sandbar, have the boat take you close to the breaking wake and jump off and start paddling. I just know this from vids and crap.
last century I had access to a sailboat. we'd hang out at the mouth of the port to await freighters. I'd be on the spar on the bow and we'd head right for it. The "swells were over 7'. we'd get air and a killer drop. Once I was driving, coming from Hampton to Norfolk and mid way I saw a big swell coming in. I turned to hit it head on, but when I hit the top, I cut it hard, blasted off the lip and did a bottom turn. Everyone was pissed due to crap in the cabin being strown in all directions. and the wife too. she was especially perturbed.