Real-world locations! Lake Shibire is here. The ゼブラ they shop at is セルバ (that’s actually not on the either of the fastest routes between House of Shima and Lake Shibire that are suggested by Google - going via route 52 actually adds 20 minutes to the trip).
The fourth panel on page 94 is here, but the fifth panel appears to be outside the reach of the street view man, which is a shame, because I’d like to get a closer look as to why Nadeshiko’s sister is confused over whether to turn left or right - there doesn’t even seem to be an option on the map.
I also found this video, a sort of making-of video about a TV show segment in which they visit this campsite specifically because it was in Yuru Camp:
The Fuji Eight Lakes were:
The ones I’ve marked with an asterisk are the current Fuji Five Lakes. Near as I can tell, the designation “Fuji Five Lakes” was invented by a newspaper editor in 1927 as a way of getting the public to vote on them as one of the most scenic areas of Japan - when they were initally entered as separate lakes, the votes were spread out so far that none of them did particuarly well in the rankings. At least, if I’ve correctly understood this description.
No idea who came up with the idea of the Eight Lakes, though.
Bonus, less-relevant information
As well as the Fuji Eight Lakes, there was also a second set, called the Outer Eight Lakes, consisting of the following:
We’ve seen Lake Suwa, earlier.
Page 82, any thoughts on what ムニョムニョ is intended to convey? I’m certainly getting feelings of… round and blobby, but for some reason, most of the results I get on Google Image Search are pictures of Thor’s Hammer.
Page 83, for 備長炭, while Jisho has ～ずみ written as the primary reading, ～たん is what she says in the anime, so I’ve changed the vocab sheet to reflect that.
Have we seen Aoi at work before? I’m pretty sure they had a scene or two in the anime before this point, but I can’t remember if it’s been in the manga.
Did they ever buy the sister’s coffee?
Page 97, final panel, exactly what is Rin looking at?
Y… You’re an abrupt ending.