Take a cane too, so you can do the whole "angry grampa" thing and point the thing at passers-by (and swing it around, of course ("lean a little closer... so I can hit you with my cane!"))
(only joking, of course, I don't mean it as any kind of comment on bringing a wheelchair (or about your age..). No problems there, I'm sure
)
And why am
I talking, I'm not even coming...
(Edit): This reminds me of my grandfather, who we as kids used to push into the little park on the hill and whenever a... young lady would pass by he'd "shoot" at them and whatnot