Thanks! Ill make sure not to miss those. But yeah I had a bit of trouble getting back to the entrance on my first time through the area. Thankfully gave me plenty of enemies to fight to boost up my levels.
Also if you want to level up your characters faster, while its slightly more difficult in the sense you need a lot of SP items, you can do the offline - online mode bring 3 NPCs that you want to level and go to that endless dungeon.
Only issue is you cant do the normal communication with the AI that can recover 50 SP each time. You can still issue them general commands like defense / sword skill though. Also you wont gain the friendship points too in the offline online mode, so its more for just pure leveling / item hunting / weapon skill up.
But the SP recovery is mostly made up from skills / the SP items. You can stack the different levels of the SP items though.
If you get lucky in the dungeon you will pick up a good amount of them to keep the fight going. Since there are a lot of enemies you will really need to keep the SP levels fairly high / constant if you want to survive / not take a lot of time.
Sometimes there are rare pickups for equipment too. I got a pretty good shield and leg piece from there.