But seriously, maybe a family member or dear friend could step in for you once in a while and give you a break. Jim and I have had lots of experience with aging parents (as almost all of our age group has) and even though you love them past reason, you do need some alone time. You need to get to nature and recharge your batteries.
And as for the decals; that is a great point you make. Decals, nose art and other surface decoration will make them unique and easier to recognize (I've been after Jim to put nose art - like a WWII fighter - on Spamalot, but no go so far). Will this stop a dedicated thief? No, but it might give others pause.
And I like the idea of nose art - a bunch!
Camp on,
Sue and Jim