I am so sorry for the loss of your beautiful daughter,Sarah. I know that being her Mom was a gift.
I am a Perinatal Loss Counselor along with being a Maternal / Child RN .We tell our Mom's who have had losses that there are many nice things to do in memory of their child,lighting candles,planting trees,holding onto special stones,and charm bracelets or necklaces.My friend loss a baby at 5months gestation,seven years ago,and she made a beautiful scrapbook,and has a charm necklace with her two living boys birth stone,then a angel with her son,Timmy's birthstone.
I think it's a nice idea for the parents to be able to be alone ,if possible on that anniversary.
Please let me know if I can do anything. I had two miscarriages,and it was very hard.