Welcome to the best board on the net.......
As far as the rivited boats go, you're correct they will loosen over the years and may even leak as a result. BUT, on the good side, in most cases you can tighten them back up if you have access to both sides. I don't personally have experience with the Princecraft so I can't speak to that portion of your question but I'm sure someone will chime in and give some feedback................