Bad Back??
The way I see it no way 90' of chain is going to let you sleep better if your back is in pain and keeping you awake. Someone once told me as a rule of thumb that I should have a foot of chain on my rode for every foot of boat lenght, so on my 26' boat I have 26' of chain and another 200' of nylon rode. You may wish to have more than one anchor to attach to the rode for different bottom conditions. The 90' of overkill would be nice to have on hand for extended trips when you may need it in an emergency but for daysailing or the occasional overnighter I'd have something on hand that is easier to manage and just bring out the heavy artillary when needed.
The way I see it no way 90' of chain is going to let you sleep better if your back is in pain and keeping you awake. Someone once told me as a rule of thumb that I should have a foot of chain on my rode for every foot of boat lenght, so on my 26' boat I have 26' of chain and another 200' of nylon rode. You may wish to have more than one anchor to attach to the rode for different bottom conditions. The 90' of overkill would be nice to have on hand for extended trips when you may need it in an emergency but for daysailing or the occasional overnighter I'd have something on hand that is easier to manage and just bring out the heavy artillary when needed.