Unsatisfied with information on Wide Area Netowrkings to/from Fermilab that you found in this page ? I am too.
Situation and plans for WAN is sort of a well kept secret. There is plenty of beautifully coloured maps, but when you wander why in spite of all OCx path your packet do not travel, nobody knows. There are bottlenecks here and there that do not show in the backbone maps.
Best strategy seems to be: