According to this, it's pretty much a wash, as I suspected. Paying OOP for meals would save me about 50 dollars. However, without the DDP, I'd skip a lot of the TS meals we have planned in favour of cheaper (often unhealthier) fare, and would have to pay OOP for the refillable mugs (for 7!!), lose the 15% discount at the activity centre and our group would be splitting bills at each meal instead of all just paying a portion of what the DDP costs and taking turns with tips - To me, that's worth it.