You should mention in the Overview something about the trailhead being a magnet for car burglaries. See this photo.
Also, your Topozone coordinates (which appear to match those of your Kilauea page) are wrong. The correct coordinates are:
The trailhead (map): 19.4487 -155.1246
Or the Pu'u O'o vent itself (map): 19.39018 -155.10911
Also, if you want to fix your Kilauea coordinates (I think you should), the best ones to use are the ones that mark the highest point on the rim itself. This is next to (north of) the Jaggar Museum-Volcano Observatory here (elevation 4,080+ ft). Coords: 19.42393 -155.2895