What shortcodes are available?
See Bramble Ski → Shortcodes in your WordPress dashboard.
Where do I find property IDs?
Bramble Ski → Properties lists every property available to your login, by resort, with a ready-made shortcode for each.
My page says "Loading availability…"
The first time a property is shown its data is fetched in the background; it appears within a minute. The Dashboard shows when data was last refreshed.
Does it work on WordPress multisite?
Yes. Each site has its own login.