I'm still a relative newbie at all this, so please bear with me... It is more common to purchase room rates at time of booking? (Unlike a Holiday Inn-type of thing where you just reserve the room ahead of time, but aren't actually billed anything until checkout.) My sense is that the advance payment approach is preferred to a) secure your room rate ahead of time, and b) avoid getting slapped with a monstrous hotel bill at checkout. Second, I'm debating booking a flight+hotel combo through Vegas.com vs. doing everything individually. Pricing seems quite similar. Pros and cons to each?