What any sensible fishery manager does is have a net, mat and sling in every swim. Problem being that things like KHV and SVC and even CEV (the latest one) will transfer on things like line, leads, hooklinks. You name it. Braid is the worst for it as water soaks in to it Then you have birds, can't net your lake can you.
But a port of call is have fishery nets, etc. It will drastically reduce then chances of getting it. But how do day tickets do that? Places with huge turnovers and some of them a bit unsavoury.