When it comes to the fade, I second the motion not to say too much. As a long time elder, I formed the opinion that people who drift away fall into two camps. For simplification, let's call them the weak and the dangerous (as seen from point of view of elders and some others in the congo).
When you start to disappear and it gets noticed, the thought process begins: Why is he/she/they not coming to meetings? If the judgment is they're weak, or unappreciative, the absence is briefly lamented and the individuals are pigeon-holed into a special category where no further action is required, other than talking about them behind their backs. They will be largely ignored after that, except for when the CO visits and asks what the elders are doing about the inactive and others in need of shepherding. Since the elders in most congos will have been doing next to nothing about these people, a big push will be made to "encourage" those and a long list of folks to visit will be drawn up. After the CO leaves, a few half-hearted calls will be made and a note put in the file for when he returns and asks what the elders did.
On the other hand, if the judgment is you're dangerous, and this is direct proportion to anything negative you may have said to someone about the organization, the elders, or any doctrine, the spotlight will be on you. You will get calls, visits, all kinds of attention, designed to flush you out and expose you as a threat to the congregation.
If doing the fade, it is to your advantage to plant yourself squarely in the first category. It does not matter what your excuse is. Make something up and be vague. This is an exit strategy of your own devising. Use whatever works for you. Health is good, especially if you can develop a condition about which little is known; if it can be both mysterious and chronic, that's best. Depression is another good buffer. Just be careful not to be specific about what, or who, made you that way, and don't imply that "being in the truth" had anything to do with your depression. If you are "fortunate" enough to have a mate who is not a JW, you are on easy street. Blame it on them (and enlist their support for your strategy).
There are many other ways to go about this, all of which have been discussed on this board at length. The point is, keep silent and make new friends. In time, your fade may work beyond your wildest dreams.
One word of caution: Plan and rehearse for the unexpected. One day you will pick up the phone, or turn around in a public place, and be confronted by someone, perhaps an elder, who will flat out ask you what happened, and why you are no longer active. To paraphrase the scripture, always be ready to give a reply: you have some problems (above-mentioned), you're dealing with them as best you can, you know you've gotten out of the habit of meeting attendance, but you are still reading the bible and trying to keep up with your studies and getting a great deal of comfort out of praying every day. You have been thinking a lot about the meetings, and no, you don't need any help, thank you, but you really appreciate the encouragement. It's always good to end with, Perhaps I'll see you on Sunday. This strategy will move you back into the "not dangerous" category so you can be blissfully ignored for another period of time.