Well, March is the perfect time for many of the gallinaceous birds, as they are breeding and doing their courtship displays then. Wild turkeys, pheasants, hungarian partridge, prairie chickens, and just about all of the grouse species.....all of 'em are active and photogenic in March! Other than a PA turkey spot, I am not sure what the best areas are in the eastern part of the U.S., but if you are interested in traveling, I know of places in MN, ND, SD, CA, and WA that would all provide good gamebird opportunities. Many of these could combine nicely with a NE crane trip. Send me a PM if you would like any more specific information.
The other thing that comes to mind is waterfowl. If you have migration-route areas (stopover areas) available, March is when the birds visit for a few weeks. Out here, the greater Klamath marsh system is one such stopover area, and March is a very target-rich time, as thousands upon thousands of Ross' Geese, Snow Geese, Canada Geese, Pintails, Mallards, Redheads, Canvasbacks, Wigeon, Cinnamon Teal, Buffleheads, and Gadwalls use the wetland areas to feed for a few weeks before they resume their northward progress.
I do realize this is the wildlife forum, and not the bird forum, but you mentioned cranes, and honestly, March is a great month for birds, and a relatively poor time of year for mammals, so that is why my suggestions center around birds and not wildlife.
"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".