Here are some more musings....
My StL employer asked me to go onto Facebook to help our presence on social media. It was through Facebook that I noticed the job fair on PEI. I would never have seen it otherwise. (FB is much maligned in the media, and by most people, but it really does have some benefits).
My move will be a bit easier because (a) I moved last year from my apartment and (b) we moved buildings last year. So I don't have a great attachment to the buildings. Naturally, people matter far more and it isn't easy to leave them. But I hope to be back soon, maybe even this year.
The timing is pretty good. It is a good time to leave my client and June is both a decent month in St Louis (a bit warm and thunderstorm-y) and a great month on PEI. I'll be back at the height of the tourist season!