Mxsmanic wrote:
Is it better (in a small GA aircraft) to maintain altitude using minor changes
in pitch and trim alone, or using both pitch/trim and throttle adjustments?
I'm asking just about maintaining altitude once there, not climbing or
descending to an altitude.

Generally speaking, you will establish level flight with pitch, adjust
the power, and trim the airplane. At this point level flight is
maintained by extremely subtle and ever constant "caressing" in pitch.

--
Dudley Henriques