Many Scamps don't seem to have gray holding tanks because the original owner didn't order that option. Some might not want to have the additional weight
that a 20+ gallon tank adds when full or maybe just the cost... Our 2007 Scamp
, even with the bathroom option, is lacking a gray tank and came with exactly two 12 volt and one 120 volt light
and 1 120 volt outlet, There were no 12 volt outlets at all. Pretty basic except for the loo...