First off one word a WADER BELT....
And to answer your question, it's an old wisetail , your fine in waders. Might be a harder swim and cold as hell and getting back up to shore with your waders full but you will be fine.
Frank D did a whole report for an insurance company and proved that you will float and swim with waders on. And I am sure the waders now adays are much lighter then the waders Frank used... Frank is old ...lol
ps. as Frank said they never went to court
VB