Agree that track access is not easy everywhere, it's not for me either, but I deliberately made the effort to go a handful of times, even though it meant it took me out for the whole evening for a single training session.
Part of the test is about pacing yourself and getting the right cadence on the track. Generally the pack goes off way too fast and it's easy to get sucked into trying to keep with them as opposed to running your own test, it's amazing how many people that have gone out fast come back to you rapidly in the second half of the test.
Setting your watch at a speed and running at that pace for 12 minutes is fine in principle, but you do need to be fit enough to do that in the first place, if you are not, then that approach simply doesn't work.
Most of my training was on a loop near my house, 3 3/4 laps gives me 2.6k. Each lap has one 200m gentle incline and 2 90 degree blind right turns (meaning I have to slow down into taking them).
I know that if I can do that route in <13:15 I'm on track to be able to do the test on the track in 12:00. Obviously the faster I am on my home route run, the more I'm under on test day.