One thing I would recommend after you talk to your doctor is a talk with your spouse and your family.
Set some firm directions/ limits. i.e. When I show sign A - stop me from driving, when I show sign B - we need to park the rig and not travel any longer.
One of the fellows in our Good Sam chapter has been diagnosed with early onset Alzheimer's. He made such plans. He also discussed them with some of us in the group. Because his wife is not physically able to drive the Class A they have, and one of us might have to come get them and bring them home.
He also wrote a letter to himself, that he hopes he will read and understand when the decisions come.
Having lost my mother, all her sisters and brothers and their mother to Alzheimer's, I've seen the bad part of not planning ahead.