The other issue is transportation. I'm not sure what the non-resort parking rules are, but if you have Disney transportation, you would need to add 30 min for transportation. Ask yourself these questions:
(1) What time do you need to get up in the morning to get everyone ready?
(2) What time do you need to leave to get to restaurant?
(3) How fast can you eat?
(4) How fast can you get to the bus stop?
(5) How fast can you get from the bus stop to front of DHS?
(6) Is it worth all these questions to do rope drop at DHS?
If so, good luck.