Do you need a comma for these sentences?

Is it possible to not have a comma before a conjunction when the conjunction is connecting two independent clauses? I came across it in a book again, and I remember reading somewhere that you can because it’s for clarity reasons like the example below, but I can’t find where I read that, so I’m not sure about it anymore. Does anyone know if you can do this? Thanks in advance.

Examples:
Even if he was clueless and she was lost, they still continued forward.
If everyone is free and the weather permits, we can proceed.

Edit:
Do you need a comma like this:
Even if he was clueless, and she was lost, they still continued forward.
If everyone is free, and the weather permits, we can proceed.