From the campsite to where the bike gang are heading is about 770 metres in a straight line… or 2.3km by road, which includes a climb of 120 metres in altitude. The route is short enough for anyone to follow the whole thing from page 112 to 116 in street view, so I might leave that as an exercise for interested parties, but it starts here from the second panel on 112 (or even here at the bottom of 110) and continues on. The first panel of 112 appears to be a shot of the bridge they’re about to cross, from below (like so), but since they haven’t gotten there yet, it feels a bit out-of-sequence.
Page 114 contains A Clue for narrowing down where Mei and Aoi live - though since the not-Selva Aoi works at is already 7km from the school, maybe she lives at the Selva. (That said, Chiaki’s outfit and demeanor when she’s seeing Aoi and Mei off at the end of the final chapter of the previous volume does imply she lives within a fairly casual walking distance of the Lawson across the road…)
Page 116, their goal is the Karisaka Tunnel Toll Booths. Even if they weren’t about 90% dead, this is as far as they can go - bikes aren’t allowed in the tunnel. Luckily for Rin, who went through prior to chapter 83, scooters are allowed - under the current pricing, they cost just seventy yen.
The sign being pictured on the third panel of 118 is probably this one. And in the final panel of the same page, I didn’t realise Yamanashi and Kanagawa shared a border, but turns out they do - the whole length that’s (roughly) marked in this map. Guess I didn’t look closely enough. I mean, I’ve caught the train that passes through there…
And on page 120, they’re back at Michi-no-Eki Mitomi, which they (very) briefly visited back in chapter 83. カツカレー.
Pages 122-124, I think I’ve mentioned this before, but チャリくま is チャリたぬ in real life - here is the website. Can’t seem to find any evidence there’s a branch at this michi-no-eki, though. Yet?
We’ve heard Mei’s family name before, right? I seem to recall mentioning that it’s adjacent to Ena.
Page 126, hah. This is the same Hanpen as the illusory dog a few volumes ago. This really is a small world.
Page 128, when they get around to animating this volume, I wonder if they’re gonna get Goda Hozumi to voice this guy…