Could it help to make a distinction between multi-posting when replying to just one post, and multi-posting in response to multiple posts?  I know some people like to use multiple posts to reply to multiple posters because they feel it's more polite.  I don't have a problem with that happening, but I'd be willing to do away with multiple posts that are responding to one post from one person.

Great cave pictures!  I think I've been to Luray before, but it was when I was younger.

I don't recall it ever being an issue in "developed" caves, but I remember when I used to cave I'd have to hold my breath to take a picture or the flash would reflect off of my breath and the picture would be foggy.

I'm glad I'm not the only one crazy enough to make a long drive to see Jim.  Hope I get to run into some board members.  (If you see someone with black hair and a Red Court t-shirt it's me.  Say hi or snub me at your discretion  ) 

I'm pretty much fine with anywhere.  If I'm picturing the right place TGI Friday's is pretty much right down the way from Joseph Beth.  (There's a whole lot of restaurants right around that area).

Barring any unexpected changes in plan, I'm hoping to take a little mini-vacation and come out for this.  (It couldn't have happened a year ago, when I still lived there).
No costume here, either, but I have my homemade Red Court t-shirt. 

(Hopefully this won't be like my last trip to KY, when I blew a tire halfway back).

Occasionally I wonder if there's a market for selling my photos, but I really have no idea how to do it. And there is a lot better stuff out there. I tend to just get lucky.

Have you looked into setting up a store on Etsy?  It's free to have an account although I believe it costs something like 20 cents to post each item and that gets it listed for 4 months.  Once the item sells they take 3.5% of the price.  (That doesn't include shipping - you charge whatever you need to ship it).  It could be a relatively inexpensive way for you to judge what kind of market you'd have.
You can sell photography via CafePress as well, but I think that has more limitations and less profit in the long run.

There's also the option of just making passing mention of other supernatural beings existing - ie. other characters briefly mentioning it in conversation.  That way you don't have to go too in depth at first and heap up too much on the reader and you've also laid some groundwork; if your original story idea becomes more than one book you've got some background to use to introduce other characters.

being over or in flowing water saps his strength

That's a good one that I don't see used in a lot of modern interpretations.  I've always liked it though.  (Empathy I think - I don't like water  )