Sounds like a fun trip. Great point on crew, make she she's 100% into it. If not it can be a deal breaker.
I did a similar type of trip last summer, NJ to Annapolis, but at much slower pace, sailboat. Think about and plan for potential issues. What happens if you lose an engine? Electrical issue? Bad fuel? Need to ditch for a safe harbor? Need medical assistance? ...
Docking is only fun when you are watching some one else do it.
Practice.
I dont mean to rain on the parade, just have a plan for the potential issues. With that done and clear to all on board have fun.
I would still stick with old fashioned charts too. Back to the power/electrical issue. Keep tabs on your location every ~30min, just in case.
Atlantic NOAA Nautical Charts
Make sure you can fix seacock, water pump, fuel filter issues while under way.
One last thing, dont fight the weather. Good wind on your nose increases fuel consumption. Big sea make for a long day over the rail. Be flexible in your schedule. If the weather isnt right, dont press your luck.