What a wonderful idea. My OH was in hospital for 6 weeks last year after being admitted as an emergency with a UTI and sepsis. He spent most of it in a hospital gown, reluctant to leave his bed or chair because of the lack of coverage they provided. He was occasionally given two so he could wear one the opposite way round, but not everyone offered him that level of care.
I'm also disabled and couldn't get from disabled parking to the front door of the hospital, let alone to his ward.
You can just imagine the stink from his hospital bag (that had a change of clothing in addition to what he went in.
He was even discharged in a hospital gown (just the one, with a sheet to 'cover his modesty, which fell off as he climbed the front doorstep!)