Where, roughly, is your current home. I don't know too many ways you can get to accadia that are flat. Some of them are downright vertical.

I think the point where you have to ask, is the point where you know it's too much.

What is more, you have several hard points in your trip where you need to be places at certain times, which is normal enough, but a killer.

Don't fall for the training routine, that's like dieting, if you are already into it, great. Otherwise it can just be one more stress that will make the whole thing too much. The smart way to have a good time is to keep the mileages real, and the timetable loose, and just enjoy it.