Quick question
Roaming analog is a stronger signal, you can use it without a plan, you will just pay roaming charges.
Roaming plans are specific for your coverage area, as a "general" rule F&C Amer $5 allows no roaming charges as long as your roaming minutes are less than half of your total minutes used.
For example, you have used 650 minutes so far this month, 324 of those minutes can be roaming.
Notice I'm talking about minutes "used" not total minutes in your plan!
Call customer service and get the details for your CSA when you add the plan, then there will be no surprises.