Since you are at the Beach Club, I think hoppers are definitely something that you would like to have. Like I said before, if you want to enjoy the resort, you should hit the parks first thing in the morning, then come back and enjoy the resort and SAB and then walk or take the boat to Epcot or HS in the evenings. By DP I think you are referring to the dining plan. If you use it correctly, the dining plan will save you money for sure. That means you use the table service for nice dinners (that normally would cost you at least $40 per person), use the quick service for a super lunch (at somewhere like Sunshine Seasons or Flame Tree BBQ). However, when people use all their table service on character breakfasts, to me it's like tearing up twenty dollar bills. If your family does not want to sit down and have a nice table service dinner every night, then I would not go with the dining plan. Personally, the quick service dining plan I do not think is worth the money. But used properly, the regular dining plan will definitely save you money.
And thanks for the good wishes!