When you start planning, I'd be happy to help you plan from Little Egg Inlet down to Cape May. Scott is right...local knowledge of the NJ inlets is very important. Most are not very friendly, especially at night. It takes me about 5-6 hours from Cape May to Atlantic City...probably the 2 best places to stop for a rest or whatever. The trip from AC to Sandy Hook takes me about 18 hours with good wind in a mid-size boat. Coastal NJ is pretty much free of obstructions....except traffic up toward Sandy Hook and as you approach inlets early in the AM in the summer (some of the serious fisherman fly out of them at dawn!). I would recommend staying about 3 miles off of the coast....it will give you some sea room but will keep you close enough to the coast to get in quick if needed. The seas also have a tendency to be less confused. However, you know your boat and your comfort level with that distance from the coast. If you plan to stop anywhere south, I'd make it Cape May and/or Atlantic City (we'll be there to meet you with drinks in hand!). Most of the other inlets are a distance from any fuel, docking, etc. Cape May and Atl. City are a few minutes from food/fuel/slips. I've detailed the Absecon Inlet (Atl. City) in the SSCA Crusing Station resource so you can access that if you're a member. If not, I can fill you in on the information if you plan on stopping there. Of you're going inside, I know that you can't get from Great Egg Inlet to Absecon...the bridges at Black Horse Pike and Atlantic City Expressway are not high enough, even for some power boats....so plan on going outside between those inlets. From Absecon Inlet to Little Egg Inlet, tides will be your issue. There are some areas where you have about a boat length of wiggle room and the Great Bay isn't so great!
As far as the Delaware Bay goes....if you stay in the shipping channel, you'll be fine, go with the current and plan on travelling the Bay during daylight hours. The thing can be a mess and may times there are things floating there that you don't want to hit. The shipping traffic is moderate but you'll still want to be seen! If you plan on using the Cape May Canal, I'll help you plan that (you'll need to know where to turn!), otherwise, you'll have to "'round the Cape" which isn't bad (haven't done it in a 22' though!).