From what I can see, from my own limitations and a friend of mine who has substantial difficulties walking, there are three issues with handicapped accessibility: distance, terrain and reaching for the cache itself. How about a ratings system that people can add to their cache pages, called for example the Sonoran Physical Ability Scale with a number for distance/terrain/cache. The number for my abilities, based on a good day is
Physical Ability Rating Scale
Distance to cache from parking
1- less than 0.1 mile one way
2-less than 0.25 mile one way
3-less than 0.5 mile one way
4- less than 1 mile one way
5-greater than the above ratings
Terrain to cache:
1-The terrain to cache from vehicle is very flat smooth surface. Wheelchair can make it.
2- Level surface but terrain is not wheelchair accessible (unmaintained or no path)
3-minor climbing (in and out of washes)
4- small hill climbing, no scrambling, may be rocky
5- take your chances, it’s greater than the previous ratings
Cache
1- easy reach from chair height, no stretching or bending.
2- May require bending, kneeling or stretching
3- Crawling may be required,
4- Get the pain meds, it’s going to hurt.