Good video. You're right: It's all about location location location. Even if you're inland, there's lake beaches right ? Or sand wrestle pits. Or sand volleyball. Or upscale soccer fields at private affluent schools. Or even the grass directly adjacent to swimming pools, people tend to take off their rings "for safe keeping" and hide in their tennis shoe at the pool-side, etc... Ski slope lift lines, etc.... Many places are better than junky picnic sites that will tend to be loaded with foil & tabs.
You are right that a lot of people will ask "what machine is best for gold rings". And they'll be pointed to machines that are admittedly good for teensy chains or earings, etc.... But fail to realize that the machine is only a small part of the formula. Even a regular coin machine (that can't find tinsel thin chains) will score all kinds of rings, provided you're in the right spots where gold is more likely to be, in the first place