My employer provides my housing. Do I need renters insurance?
Yes, for the same reasons as any tenancy. They insure their building and their liability. Your belongings, your liability and somewhere to stay after a loss are yours. The arrangement being convenient does not change who owns what.
I share with coworkers. Can we split one policy?
Generally not between unrelated adults. Each person’s belongings are their own to insure, and one policy does nothing for the others. Separate policies are inexpensive and avoid an argument about whose property was whose.
I am only here for the season. Is it worth it?
Yes, and keeping it running between seasons is worth more than the saving. Continuous cover is itself a rating factor that follows you, and your belongings exist whether the season is on or not.