Not to early to book. It is a fairly busy weekend in the area, notwithstanding KP visitors. There are a couple of hotels in Great Neck, but I can't talk to them as I haven't stayed at them. There is a HI Express in Roslyn, but it is typical of HI Express' these days, which seem to be just so-so. There are a number of places around LaGuardia. There are a number of places around Carle Place and Westbury. That is about 25 minutes from campus. A car is much more convenient to have, although Uber does serve all the areas. On a weekend like parents weekend, a car is probably cheaper if you intend on eating out, possibly going to the store to buy some contraband, etc.
For parents weekend, there will be a schedule issued. It will be up in the air until the week of or so. Your plebe will not know if he will have liberty or not. Your plebe will think he will not be able to leave. He will tell you he probably can't leave. You will get upset and say that is total BS. Mom will start to get upset and complain to hubby who will say, what do you want me to do about it......That will go on for a couple days, and then, like magic, liberty will come through because the plebes met some goal. They will likely be restricted to campus Friday. They will be required to attend the parade, acceptance, etc. and if there is a football game, that as well. There is usually a rugby match. There is probably a good likelihood that your plebe will be able to be off base Saturday and Sunday evenings, with a report time of somewhere around 4-5pm Monday. Mass and religious services are likely not to be held on campus because of the holiday and weekend so double check service times if you are thinking of attending Mass/Services on campus before you make plans.
Be warned, that your plebe may not want to run around NYC on the tourist train. Sleep may be in order, or, just eating at Fridays or BWW may be all they want. If there is a roommate, or buddy whose parents are not in town, you may want to think about the offer of letting your plebe bring a buddy with them if you have the room etc. or even just to dinner.
And, finally, when the plebe gets back to campus Monday, they will learn at pkt that they screwed up big time over the weekend, because either someone was seen out of uniform, someone didn't say hello properly, someone's white shoes had scuffs on them in Times Square
and any benefits they had earned to date will be thrown out the window, and they will go back to step one.