As Control snatch states, the ops at TN are such that you cannot separate aircraft from the fast Mil jet stuff, just segregate the other traffic away from it. If the activity means that part of the airspace can be released for civvie traffic then it usually is but only at short notice, which wouldn't be enough for flight planning requirements. Waiting untill you are identified and vectoring around is, given the coverage to the south, poor technique and would be more track miles than by J251. The RAAF are flat out getting enough TWR and Approach controllers so you won't see anymore enroute rated RAAF ATC, especially given the $ and time involved. However Cap'n Bloggs is generally right about the hours mentioned re; activation of those R areas (as well as the dark bits of the a.m. during the week) so if you operate between AS and DN during those hours, then speak to someone in Airservices in Brisbane and see if you can get a dispensation to plan A461. Given that A461 is about 20 or so miles shorter than J251 I don't fancy the chances but if you pays your money that makes you a "stakeholder" and service delivery is the latest buzzword, so you never know.
