i've only been to DL once but will try to help.
we are a party of 6 going in may. we are driving and not flying so i can't help with that part.
we are staying at the Hyatt Orange County. right now they have a rate of $250 per night for a 2 bedroom suite. one room with a king and the other room with 2 queens, a small living room with pullout couch inbetween. there is a shuttle to the parks. so you could plan on $300 per night for hotel to include taxes.
there is a small fridge in the hyatt room so we plan on eating our breakfast at the hotel, getting something for lunch at the park and pizza or something easy for dinner. we are not big foodies. i budgeted $120 per day for food. again, we are pretty simple in this department and i plan on going to the target (across the street) and getting a few snacks, bread, yougurt, etc
souvenirs. i am giving each of my children $50 to spend in the park. the remainder of our group is adults and i don't think this is an issue for the rest of us.
transportation. i am not sure what the shuttle costs but i have budgeted $40 per day for additional transportation.
our tickets will be $1300 - that is a 3 day hopper pass for 4 adults & 2 children.
we will be skipping the character meals this time as my girls are not fans of costumed characters. we will see them in the park if they work up the nerve
i also have gasoline costs and a hotel on the way in my budget but that would not apply to you. i hope this helps. i think where you stay will dictate many of your expenses. good luck