Most of the caches in the town centre are easily accessible - the difficulty is not being spotted! Its just the three multis (Mines a pint, Green Plaques and Secrets of the Auld grey town) do involve quite a bit of exploration. They're brilliant caches but maybe too much if you're on crutches. Mind you, you COULD hire a shopmobility scooter thing to whizz around on.
I can recommend scout scar - park in an old quarry on the road between Kendal and Underbarrow, the path from the car park is (supposedly) disabled access. Its a little steep for a hundred yards or so, but then flattens out along the ridge. Fantastic views, particularly in the evening. There's a cache near the car park (First to...) and another near an obvious viewpoint. There's also a few along the cliff running northwards from the car park (Cunswick Scar). Parking Here
Thank you for these great suggestions, I am making notes of them all. Only two weeks to go ... can't wait!
Mysty