I don't think anyone can know if it will work, there have been cases where 1g has killed the person.
My opinion is that it won't work, no offense. why? For fasting. There have been too many failures due to not following the instructions in the guides. Fasting is perhaps the most important thing after not vomiting.
If it will be in the morning you can say that last night's dinner made you feel bad or something and that your stomach is upset and you won't have any breakfast. Even the night before you can say that you feel sick to your stomach and in the morning what I have already said. It will be more plausible. That way you can achieve many hours of fasting while you sleep, I don't know if it was a myth that digestion slows down when you sleep. Still, what will it be, 10 hours from dinner to SN? It would be ideal. I will spend 11 hours because I eat hard, I also live with my parents and those days my mother cooks a lot.
Think about everything very carefully, I also have my day close and I am planning it. You will definitely need the scale. I was recently told that metal oxidizes SN when mixed, so I should use a plastic spoon just in case. disposable cups to weigh better than if you used a glass one... every detail matters, try to plan that day in your head, from a to z, will you carry everything in a backpack? Will the hotel have glasses? Will there be anything to mix it up? The scale, do you want music while you wait? The do not disturb sign on the door, a note? Everything you can think of.
I think about things a lot, and this will not be an exception. I hope I've helped