Parents not wanting them to camp out overnight but riding the train three hours away by themselves is fine.

They stil be back at night and not alone in the wilderness over night

Fun fact! I haven't watched this anime yet but I'm going to finish downloading all the episodes and respond/comment to each of it just for fun ( ╹▽╹ )

kumaaa

I have went to Mt. Tenjo. Maybe the next time I am in the Kawaguchiko area, I should just go for it and summit Mitsutouge!

Nice friends, this anime is good.