On Sunday Dad got a grab on the swing moments after I walked up to him to call it a morning and a minute after he said let me take a couple more casts (wedding planning trumped fishing this weekend).
Modified ESL got the bite. Unfortunately, shortly after the grab the fish started to buck at the surface and the hook pulled. Probably nothing he could have done. Looked like a healthy winter fish and was enough to rekindle the fire. Dad has been beating me up on the swing this winter. He has a good feel for the drift.