I think that a lot of us as we grow older, we tend to realize that our bodies need more TLC and maintenance as we see the effects of aging set in. Regardless if the person has smoked, spent hours basking in the sun, ate 2 buckets of french fries and fried chicken a day with a gallon of tequila, once there is a conscious choice to be healthy and take care of one's body, it can work wonders physically, emotionally and spiritually.
Personally I think there were many reasons for Camilla's health hiatus other than for "superficial" renovation. First off and probably primarily is downtime. I think both Charles and Camilla treasure their "alone" times and this week for Camilla was a very private and relaxing stress free retreat. Coming before an extensive tour down under, I think very beneficial. Second reason would be Camilla and flying. Like many people, she just doesn't cotton to it well. Breaking the trip down into two flights a week apart probably helped. Most important though is this type of a retreat isn't like going to a fat farm or an expensive beauty make over. These specific retreats focus on the integration of mind, body and spirit with diet, exercise, yoga, meditation and to be honest, I'd love to have a week like that for myself... I think we'd all benefit from something like that. The good thing is, once you feel the effects of such a retreat, one does make certain changes in their daily lifestyles. Its called learning.
Actually, Camilla has set a wonderful example for older women in her choice of a health retreat I think.