I need to fix a yard that has ruts due to moles and erosion that
increased the depth of the ruts to be deep enough to twist an ankle.
I figured that I could roll the lawn to decrease the depth of the ruts
and then fill in the remaining crevices with topsoil.

I do have a septic system, so one question I have is whether or not to
use the roller over the septic, or just avoid that area.

Are the rollers available at the local lawn and garden (280lbs when
full of water) effective or what weight range do I need to consider (I
have a lawn tractor to pull it with)?

Or should I rent a roller from a supply store?

Should I avoid the septic area, or is it all right to roll it once
every x-number years?

Will the roller (at whatever weight) do the job of compressing the
lawn, or should get topsoil first to assist with the leveling process?

Should I aerate any area prior to rolling, in order to get more
compaction in the trouble areas?

TIA,
Dave