Sam and Watt left the place so that they could continue the exploration from where Sam left off at Dawn.
He already mapped more than one-fourth of the territory. The island might be big, it is only thrice as big as the imperial capital of Arian.
If it is the only journey, Sam is confident that he can circle the whole island more than twenty times in a single day that is only on feet, if harbinger was included, he can do that five times faster, but observing the surroundings and checking for trails of beasts and traps is something hard.
The territory to his right belongs to the Thunder god temple team and the territory to his left is the Arian team while the territory opposite to his is of the Northern region team.
Now, that he knew where the remaining candidates are situated, all he has to do was deal with the mapping problem and then start implementing his plans together with his teammates.