Small with Hairs. Orange with Black spots/ stripes. (Oregon)
When you say small, just how long is that?
Your caterpillar is a western tent caterpillar.
This caterpillar feeds on red alder, snowbrush (Ceanothus), and bitterbrush in the west as well as other broadleaf trees such as aspen, alder,cherry , oak, and willow.
These are found in wooded areas, roadsides, and treed yards and gardens of the western North America as well as east to Quebec then south to NH and NY.
The female moth is lighter colored than the male. These moths fly at night and come to lights.