Print it in a book, on good archival quality ink and paper. Make a couple of copies stored in various locations in case of natural disaster.

Look the English language is a lot different today than it was in 1621 and with the pace that technology changes I strongly doubt that anything web related will be able to run. (Assuming that civilization will still be standing, they still have a way to power technology)

So, that pretty much leaves ink and paper. That's your best bet, and even then that isn't a sure thing.