Ok depends on the size of trout you are talking. Around here trout can average as pan fry 12inch trout in some waters and other areas exceed 10lbs
There is one flaw to single hooks for C&R trout fishing and that is eye hooking or brain hooking trout if the hook size is a bit big compared to the trout. In my opinion a barbless treble is better for solving this issue or run smaller singles but you will loose more larger fish on the small single
I owned a U catch trout pond for 10years and got to see the results of different hooks, lures, and bait/hook combo’s
if you want to run singles for C&R trout think of the size of trout and pick a hook with a gape that is just small enough that it limits brain hooking on the smaller trout you catch