The memorial is an open area in a public park. Though I don't believe there's a cut off for when you could visit, you would want to attend during the day or early evening, preferably before sunset.

Waterfront - don’t have exact address sorry

If you're driving, the Holland Tunnel ...If you're parking on the Jersey side, PATH train right to world trade center. If the weather is nice, the NY Waterway ferry from Pauli's Hook Jersey City. If you're Amtrak-ing it to Newark Penn station, the same PATH train to WTC. Hope this helps

Yes you can do it

Drive downtown towards Grand St, Pacific St, turn left onto Johnson. Best time to go is early AM or early evening. Check out the 9/11 Memorial, the view of Miss Liberty, the view of Ellis Island. Enjoy the photo opps !

the view of the 911 Memorial can be seen all along the waterfront….you can see it from Hoboken (where you can get a parking spot by a meter) or you can see it from Jersey City…you can park in Newport Center (a shopping mall in Jersey City) and then walk outside to see it...

Sorry I didnt see this earlier. You could certainly do that but it would very expensive ($45-50 Id guess). If you have your heart set on private transport try an Uber-it's usually as much $20 cheaper between Manhattan and Jersey City area. Or grab a bus or taxi to the Path train at Hoboken (Id guess not more than $10) and take a Hoboken WTC train (green line) there for a swipe of a metro card (I think its $2.75 now). It'll probably take you half as much time to do that on a weekday as well. Weekends is a little trickier as the schedule between WTC and Jersey City is not as consistent. Also you would need to go to Grove St or Exchange Place to get a WTC Train on weekends. Check a PATH Map for details.

Check "statuecruises" for advance tickets, because when I took the Statue of Liberty cruise, I booked two months ahead, though it was not a holiday weekend. Reason being is I wanted to go up to the crown observation area, which sells out fast, otherwise, up to same day, you'll only have access to buy tickets that stay only on the island or up to the pedestal level. Regarding Liberty State Park, it's open to the public 365 days a year, and only needs an additional parking fee. For other paid attractions within the New York harbor and along the Hudson and East Rivers, such as the World Trade Center Observation Deck and 9/11 Museum, I'd check availability right now. Hope it helps!

This requires a quick trip to NY Waterway Ferry from the Lincoln Harbor Terminal (which according to Sheraton's website is available 7 days a week). The ferry leads you to Pier 11 (38th) and from there you would grab a free shuttle to various stops: Lincoln Center, 57th. The Liberty Tower is on 58th. I would warn travelers that while simple, the day trip can be exhausting. One must always be mindful of high-travel times and peak rush hours which can be tiring to navigate (not impossible) for those traveling with small children. However, the experience itself is a payoff because it is not only a necessary lesson in patience and tolerance it is also a history lesson. For that reason alone, it's worth whatever seeming hassle is involved. It is nothing like the overall horrible event of 9/11 but it is a testament to a city's resilience and overall love for one another. Happy travels!