Late note here, but for further note, the toll on the DMB is only for those going west.
Also, there's no 'easy' way to get to AC from the DMB, unfortunately. Route 40 is hellish from Pennsville to Mays Landing. Two-lane tractor road, many trucks, and at least one fatal head-on per week. If you go north on I-295 towards Philly, to pick up the ACE there, it adds an hour to your trip, because there is no direct way to the ACE Eastbound from 295 Northbound. You have to get off 295, circle around, and then get back on southbound, to pick up the ACE. And there's a lot of construction going on around there right now.
If I was going from Washington to Atlantic City, here's what I'd do - 50/301 Eastbound over the Bay Bridge, then 50E at the 301/50 split, to Salisbury MD - then north on US 13 to 9, and 9 east to Lewes - then take the Ferry to Cape May, and then a straight shot north on the GSP to AC. It sounds a bit complex, but it's really more pleasant than the 301/896/295/40/322 route. Your only trick is timing for the ferry - get there too late and you sit overnight.
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