USA: Places to get tows in ID, OR and WA

The SSA "Where to Fly" feature shows Bend and North Plains in Oregon,
Evergreen, Enumclaw, Wenatchee, Ephrata and Spokane in WA, and nothing
in southern Idaho.

Are any of these operations private clubs, or closed during the week in
the summer?

Are there any everyday tow operations not listed? (I note that neither
Parowan, UT nor Ely, NV are shown, and both have recently hosted
sanctioned SSA contests.)

~ted/2NO