Look for guides that follow the migration! You could be in one spot this week and 8 hours away tail end of the week.
Ones that only set up in one spot are held by the weather and migration. Your either in them or spending the day shooting the bull. The stationary guides can have some pretty impressive sets though. Some ranging in 10k plus decoys. When the birds are passing through they are stacking them. They usually have a list of clients waiting for the phone call. Makes it difficult and expensive for those that have to fly to hit the correct timing at times.