Give them something to get around. Doesn't have to be a conspiracy. Big unexpected monster, get them REALLY lost and then they ar arguments, even they cannot go the way they intended due to - road is blocked, pass has collapsed...whatever. They have to take an unexpected route.
Or they find something unexpected. Old ruins, strange item, subspace anomoly which they just have to investigate, hell even an injured creature who isn't what it seems.
Something which makes them stop. Perhaps they find a badly injured monster or whoever the "bad guys" are. Someone wants to help, the others don't. They find a tomb of person X, someone wants to go in an loot, someone else thinks it's graverobbing.
I don't know the characters but they surely can't all agree on everything. Or even someone is wrongly accused. Someone looses an item and it is found amongst the belongings of another, did they steal it? Was it simply dropped and picked up, was is planted there.
They will get to where they need to be, just make it sound its a roundabout route- if they get lost, argument of "we should have taken left path" etc.
Just a few ideas.