Where are you located? Might help with recommendations..

Good point.

Wisconsin. But we (my wife and I) are alway looking for a good excuse to a warm weather destination! LOL.

Every few weeks I get a notice from these guys about their swim camps, but probably not exactly what you asked for. These seem to be mostly open water, and at your own speed and tolerance for distance. But man, they do look really fun, and it looks like the ages are mid 40's to 70's or so. You can watch their videos of past camps to get a tiny bit of the flavor. I like the Mexico one, really a vacation with some swimming. The Catalina one is interesting just because I live right there across the water, so no real travel costs.

I'm not affiliated with these guys or been to any of their camps, but keep them in mind just in case...


https://swimcamp.us/information/

Monty,

You are spot on. That camp looks awesome.

I'm confined to a 25 yard pool and need simply to expand my skill set to incorporate muscle groups beyond freestyle.

Swimming is great for us older folk; it is low impact and incorporates most of the muscle groups.

Tiptopshop