Amy, I am so sorry to read about the loss of your Grandpa. I can understand how you feel, because I have to face up to having a lot of my family, the ones I knew, on my Mothers side, die over the years. Aunts, Uncles, Grandad, My Mum, and also the death of my husband, Fred. I still miss them all, especially my Fred, who never got to see his grandchildren.
Even though faith helped me through the grief I have to say not one of the funeral services did and I vowed after Fred died never to go to one again. I had to break that vow some years later when my nephew died, by his own hand, I went because I was needed, not to go would have hurt my brother and his wife so much. But I hope that I never again have to break that vow.
Amy, your Grandpa sounds like such a lovely man, I really do feel that he, like all of our lost ones, live on, in our hearts and memories. Keep him close in your heart, and one day you will be telling your children and grandchilden about the camping trips and jerky and all the other things, big and little, that will make a real person out of the man in the pictures.
I still cry sometimes but I just as often smile too, thinking of some event, words or funny thing that was shared. I hope that soon for you too, smiles will replace many of the tears. God bless and take care.

Love and big hugs
Chris