Barb, I'm in North County and had to help my 18 year old crf kitty end her life a couple years ago. Please know that home euthanasia here is not the same as in a vet's office due to regulations about what drugs can /can't be transported. I urge you to do a lot of research, and ask a whole lot of questions from many different sources. My neighbors had a very old, ill dog and had home euthanasia from a respected and qualified source, but it ended quite horrifically. It could have been alleviated had they been in a clinic setting, but since the process had started at home, they were stuck there. The family is still traumatized today.
My vet allowed us to take Sheba outside the office under the trees, where I let her nap for an hour in the grass (always her favorite place) away from the sounds and smells of the clinic. Very easy, peaceful process for her.
Oh! And finding a reputable cremation place can be difficult, I can help you with that too. My vet was very diligent about investigating crematoriums.