Beat dungeons again?

First time player. I beat Woodfall temple and had to do a reset once I believed I had done everything. I was annoyed to find that resetting time made the waters of Woodfall poisonous again, but since I felt I like I had cleared the area it wasn't a big deal.

Fast forward to Snowhead temple and I beat it with less than half a day left, so I had no time to explore the thawed Goron Village area. Cue the reset and, naturally, the region is snowed in again.

Do you have to re-conquer every dungeon quickly just to have time to explore every healed region?

Because that would really suck.