We met a couple in Quartzsite one year. The wife was quite bad with Alzheimer's. Didn't appear that she could function socially much at all. He doted on her, but did not leave her alone outside for even a minute.
Are you the primary driver? Are you alone? Any idea the rate at which your disease is progressing? The answers to those questions would help make a decision.
If you do decide to continue, I would definitely have an exit plan in place to make it easy on your partner. If you become belligerent and difficult to deal with, that would make a transition back very hard if the plan is not already there. Make those decision now while your mind is still clear.
Good luck.
Dale