Slightly off topic: there are movement rates in 5e?
Where are they described? In the basic pdf and/or the Starter Set? Currently away from books so I can't check.
I'm asking because I'm running Lost Mine of Phandelver and I handwaved cross-country movement to "You can move one hex per day," because that made sense to me.
On topic: using smaller six-miles hexed works.
But you could also keep it at 24 miles per day and say that a mile in your campaign world isn't the same as in our world. Traveling at a fast speed gets you one hex further, while traveling at slow speed only gets you .5 hexes further. Or if there's also a medium movement speed:
At a fast pace, it takes you one day to travel the distance of a hex.
At a normal pace, it takes you two days.
At a slow pace, three.
Yours truly,
Someone who apparently has no idea how traveling works.
In the Starter Set Rulebook you can find it on page 15 "Travel"
"Characters can walk about 24 miles in a day"
No mention of fast or slow travel & difficult terrain here, to keep it simple I imagine.
Moving one hex per day is a bit low.
Looking at the top right of the map on page 5 of the "Lost Mine of Phandelver book" you can see that "One hex = 5 miles"
So that makes about 5 hexes per day.
It's not completely clear to me since the text about the ambush also says.
"When they're a half-day's march from Phandalin, they run into trouble with Goblin Raiders from the Cragmaw Tribe"
but if you count the hexes you're about 5 road hexes away (one day)
The read aloud text also says
"You've spent the last few days following the High Road south from Neverwinter, and you've just recently veered east along the Triboar trail."
Before the road goes east there's about 10 hexes (2 days) so that seems right.
Perhaps you're moving a bit slower because of the oxen and the wagon?