You could ask your HR rep for a different date which can put you on the other track. It’s harder to change to Terminal from Enroute based on anecdotal evidence and given there are I believe 3 Enroute classes for every 1 Terminal class.
Honestly, don’t think about specific locations. Assume you are going to end up exactly where you do not want to go. If you get Enroute, you may be forced to go to Alaska as recent Academy graduates have. If you get Terminal, you’ll probably end up in a city like Lafayette, Louisiana or again Alaska. Try to get first in your class so you have more options to choose from, but it might not matter as they may make you go to NY or Oakland if everyone else in your class fails. In my opinion, the worst part about getting started in this career is that you have little to no option of where you spend your first 3-5 years (in some cases maybe more).