If you know someone who can take you in to see Rav Aharon Leib Shteinman, Rav Chaim Kanievsky, or another major gadol, then go. If not, chances are you will be waiting for hours just for the Rov to show up and there’s a 50/50 shot that he won’t. Then you may have two or three minutes to ask him anything, but chances are you’ll just get a quick brocha.
Just take your sisters to the Kosel and say tehillim for 7 hours. It takes the same amount of time and accomplishes so much more.