wrote:
Thanks. I was aware of the voluntary nature of TRSA's,
which is why I specified VFR and asked if participation was
encouraged/permitted, not required. Let me ask the same
question in a more practical setting.

If you were flying XC VFR /X and your direct route took you
through a TRSA would you make a call and try to participate,
descend to fly under/alter course to avoid, or just fly on
through?

I'd vote for making a call and and trying to participate. Worst that can happen
is "unable VFR advisories". I don't think there's any right answer.