Simms with zero doubt in my mind. I normally wear a 12 1/2 or 13 shoe, the size 13 Simms are perfect with medium weight socks and stockingfoot waders. I am old - about like you - and do not want to fall and break anything on wet slick rocks, especially on a jetty. The Korkers - or something studded - are also zero doubt the solution to that problem at least in my mind. Those studs just don't slip on rocks. They're good, real good.
I've never had a problem with mine coming off or getting loose but have read of using duct tape to further secure them to your boots. They do make them in other than strap on options.
You can tell I clean my stuff up before I put it away.😎 Things seem to last longer that way...