"Clinical" as in "This would be useful for people who primarily work as service providers and not scientists" or "Clinical" as in "Not Pre-Clinical" (i.e., rodent/cell models)?
I mostly go to specialty conferences: RSA, CPDD and SRNT are all good, though SRNT quality has dropped in recent years as its become a near-exclusively disparities and policy conference with very little interesting clinical advances despite there being some major ones in the field. The disparities/policy stuff is also usually pretty low quality.
Besides the ones you listed, I've heard excellent things about ACBS (Contextual Behavioral Science), especially if interested in ACT or similar interventions. I've also heard good things about SRP - Society for Research in Psychopathology. SBM (Society for Behavioral Medicine) is also excellent if you do BMed-type-things. ACNP is by far my favorite - has the most innovative/rigorous work by orders of magnitude and runs the gambit from basic through public health, but its invite-only so not something you can just show up at.