Your AT-802U (OA-1K) and/or U-28 assumption is incorrect, unless you mean staying stateside. They deploy overseas, rarely if ever PCS overseas.
Also, 4 squadrons is the word…seems to match SOFORGEN & AFFORGEN from stateside to me, but who knows… 4 squadrons could give rotation between likely 2 bases, with one-off assignments sprinkled in. Of course homesteading at HRT isn't what it used to be pre-Cannon days, but some dig in like a tick and stay at HRT finding PCA opportunities in MAJCOM, DRUs, SQs, etc. Those opportunities are decreasing but still exist.
https://www.forbes.com/sites/erictegler/2022/11/25/its-been-50-years-since-the-air-force-last-operated-a-single-engine-tail-dragger-how-will-it-train-new-oa-1k-pilots/amp/
https://www.afsoc.af.mil/News/Article-Display/Article/3137974/mst-provides-innovative-leap-in-soforgen/
https://www.af.mil/News/Article-Display/Article/2846090/34th-sos-validates-u-28-soforgen-ace-concepts/