Having seen the revised question - what makes you think you're going to get a choice?
Standard flight planning for any airport in class 'A' is to flight plan to the first point of the STAR. What happens after that is, to a certain extent, completely outside of your control. You will be handled by ATC the way they want to handle you, subject to traffic at the time. You may get the STAR, you may get direct, you may get vectors.
When you submit your Flight Plan to IFPS the acknowledgement will come back (in the UK anyway) with the routeing as DCT from the STAR commencement to the destination (even if you put "STAR" in the Flight Plan). This is different from European Flight Plan Acknowledgements which will include the SID / STAR in the acknowledgement.
So - SAM DCT ORTAC (if below N866) DCT will be the required plan submission.
Of course - this is all dependant on your having a valid IR I take it? (in which case why aren't you flying airways?).