When I went out on the ledge just outside the spider cave in Dryford Crossing, I found a corpse with a note. I tried to right-click the note, which immediately disappeared and is nowhere to be found. Perhaps as a result, I can't move beyond Dryford Village, Dryford Crossing, and Stormwall Gorge. Is that the extent of the Backer Beta? I've spoken with every NPC and completed every task in these areas. How do you know when you've reached the end of the beta?

I would guess that you inadvertently sent the note to your stash. You can open up your stash from your inventory screen and take a look (it's the chest icon). Dryford Village, Dryford Crossing, and Stormwall Gorge are indeed the sum total of the backer beta so assuming you've resolved the troll, Nyfre, the Lord's missing daughter and the dungeon in Stormwall Gorge you've seen everything there is to see.

THANKS for the update. I've looked through my stash a dozen times. The note really is gone. Looking forward to the full game!!