Hello group:

 I have a 1991 Mitubishi Montero LS 4x4.  Recently I took the family
camping which involved loading the cargo compartments, filling a good
size roof carrier, and putting 3 bicycles on a carrier on the spare
tire.  When loaded, I found we were bottoming out on the stops on the
rear suspension while on rough coastal roads here in Oregon.  As I
hope to eventually add a tow package to this truck I was hoping
someone could offer advise on the addition of air adjustable shocks as
opposed to a heavy duty shock.  I am hoping to avoid the ultra stiff
ride with daily driving, but have the support that is needed while
loaded or while towing.  Thanks in advance