Scrap of paper found in hut with location 081 written on it, found in 2018#00 lots bits.
The name Alice, Corin, Adam do not match expo 2017 but do match 2018.

However the location 081 matches the location 081 from the GPS track of 2017-08-07,
but not exactly,
and also match the GPS location of a geocoded photo of an entrance taken on that day, 
at exactly that time:

GPS track:
	<wpt lat="47.693092" lon="13.807568">
	<ele>1675.044556</ele>
	<time>2017-08-07T12:44:18Z</time>
	<name>081</name>
</wpt>
Filename - img_20170807_144558986_hdr.jpg

DateTimeOriginal - 2017:08:07 14:46:00
GPSLatitude - 47  41  35.066601 (47.693074)
GPSLongitude - 13  48  27.3962 (13.807610)
GPSAltitude - 1728.00 m


All 3 points are within 15m.