[Suicide Junkie]

Big Q here:
Are the platforms on the planet armed with either PDCs or sat-targetting beam weapons?
Or, alternatively:
Can the planet + WPs destroy the SATs on their own?

If your fighting warship gets a cargo bay too, you can avoid ruining your transport's strat, and hopefully save the planet from some damage...
You did say that you'd tried it in a tactical sim, but not using the same planet IIRC.