I managed to strip the hex of the butter-soft engine oil drain plug. At least I got it out.
I'm thinking of getting the LN Eng magnetic plug, which might take a week or two to navigate its way up here to the great white north.
Probably a silly question, but is there any reason why it would be an issue to leave the engine with no oil in it for that long? (No, I won't be driving it.)
I had also dumped the filter canister and just put it back on hand tight.