Crab: remind me again, why did you request a TDA?
99% of all GA would, given the choice, talk to a local airfield / ATC. They do this from a professional perspective [ClassG I'm talking about].
Those who can't, don't, because of the lie of the land. If that was the case, then 121x5 would be useless too wouldn't it? As mentioned above.
How long have you got before you 'come out'
