Does anyone have any advice, tips, times, etc on how to be successful in getting one...? I already read the tips online from nps.gov...but experienced campers advice would be much apprecited!

The dates were planning on going was early early in the morning on Sunday, June 17th and on Monday, June 18th - we're going to try Camp 4 and tuolumne meadow...we're both going to be at each site separatly in the morning - hoping we have better luck....
Any advice is appreciated.
Thanks!