The plugs will only protect you from water ingress. If you swim out of a boat and through a hole the pressure exerted will not be prevented by the ear plugs, and you'll risk re-injuring it (presuming you get in the water during the 2 week period... it may be that you don't intend such things). Just a warning. If you're not likely to fall out or take a swim through a hole then plugs will help.
On the river, I can abandon who I am and what I've done. However brief it lasts, while on the river I am nothing important and everything insignificant. I am flotsam, and happy to be so.