  Galaxy clusters at high redshift present a superb opportunity to study galaxy
evolution, with large galaxy samples at fixed distances. Several lines of
evidence point towards large formation redshifts and passive evolution for
cluster ellipticals. At redshifts larger than z~0.8, this picture rests on data
from only a handful of rich clusters. We have observed four potential clusters
to sample sparser environments in a critical redshift range, 0.8 < z < 1.2. We
compare the photometric evolution and radial density profiles in our clusters
with more massive clusters studied in a similar manner. We also highlight the
overdense ERO (I-K>5) population, significantly redder than the old elliptical
population at the cluster redshift. We discuss the implications of our clusters
at high redshift, and possible differences in environment from richer clusters
at similar redshifts selected through X-ray or optical techniques.
