Upload & Sell: On
If it really bothers you, then why not "pass"? I wouldn't hesitate to ask if I could use a few images of my choice for self-promotion, but maybe you've already asked that.
Also, unless they give you a memory card at the start of the shoot, and you just give it back at the end, then you're probably in for some post-processing time, on top of the 2.5 hours on site (if that's what the 2.5 hours is for). I'd charge a half-day rate for that, assuming it's very straightforward PP.