Bill if it is only going to be a landing spot and not get wet (sitting water not something that gets wiped up immediately) and if you're not going to prepare food on it then the correct answer may be nothing at all. I have a butcher block in my kitchen and I use a cutting board on top of it and it has no finish and has held up just fine for 6 years now. Wooden cutting boards are no longer allowed in butcher shops here but when they were they were required to be cleaned regularly with chlorine bleach and I'm not sure oils would stand up to that. I suspect their wooden cutting boards were never treated.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.