Be sure to tape it up around the lid and put in plastic baggies just in case.
As for the the SN it should be good. Clumpy SN is still good as far as I remember reading.
https://sanctioned-suicide.net/threads/why-does-sn-clump.75489/
https://sanctioned-suicide.net/threads/sn-a-solid-block.69553/#post-1273014
https://sanctioned-suicide.net/search/795074/?q=SN+clump&o=relevance