How long is your trip?
If you only want to do 2 table service meals over a week, then the regular dining plan would make absolutely no sense.
If you want to primarily eat counter service meals, you *could* use the QSDP, but the QSDP is not a significant money-saver. In fact, it's a loser for many people. It costs $35 per night, for 2 CS meals per night, plus 1 snack. Though there is a tiny handful of more expensive exceptions, most CS meals are $10-$17, which can make it hard to even break even on the QSDP.
($10 breakfast and a $17 dinner, plus a $4 snack--- And you have lost $4 for the day; $15 lunch and $15 dinner, $4 snack, and you still have lost $1 for the day).