i dont know of a good map no sry. you can map it online with satylite photos at (microsoft terra server). you can realy zoom in on stuff, better than a map in my book.
i fish them all season worm, as long as its 50+ water temp. i usually wait till a food also. when the river hits 12ft. its time to go! keep tabs on the water hight at (indiana stream flows),its every 4 hour updates. that site is the best way to know when to putt in your time.
gills are what i use for them yes. they are hardy and easy to get. live or fresh killed both work fine. the key word is fresh.
spring you can do good at the d**n in ft.wayne or anywere a creek runs in.