Or if OP is fine summoning shovel in a solo playthrough.
Ah, yes. I saw the reference to a team in the original message and didn’t spot that the OP had later clarified they were solo-ing. I can see how charm could be more of a problem in that case.
There’s a helm - near the entrance to the Kua Toa area in the Underdark? - that I think gives some sort of boost to wisdom saving throws though can’t recall exactly what it does. And even if it were useful it would require leaving the beach scene until later in the run.