yup ,Big D, the trick is to use the ball of your thumbs ,a little at a time, then it just pops on!I have arthritis as well, but I can always put a tyre on with nothing more than bare hands. It's simply a matter of technique.
You never need levers to get the first side on (do you?). Therefore, you don't need them to get the second side on.
There is a tool out there , that can do it , a speed stik is called by , but I don't reckon you can carry it for roadside repairs .its too long.