If all you want is a room and tickets then there is no benefit to booking as a package rather than a room only reservation. In fact, you can save a little bit of money by booking room only and buying tickets from
Undercover Tourist.
If you want a dining plan and don't have an AP and aren't staying at a DVC property on points then you need to book a package in order to buy the dining plan.
That being said, you also need to consider the discounts available for the time period you're travelling. You need to do the math to determine which if the discounts (package or room only) gives you the best price for your group. Sometimes a package deal will be best (such as
free dining or 4/3 when these are available) and sometimes a room discount will be best. Even with a room discount you can still book a package which really just means adding tickets but you then do have the option of buying a dining plan if you want it.