There are six different Stormtrooper roadblocks on the map, each with a fixed location. At one of these camps, you can find Darth Vader, and at another, you will meet Chewbacca who is fighting the invaders. 

Here are all the locations of the Imperial Roadblocks in Fortnite:

1、South of Lavish Lair

2、On the island north of Lavish Lair

3、Southeast of Glassy Courts

4、South of Reckless Railways

5、Northeast of Snooty Steppes

6、Northwest of Snooty Steppes