Walk-with apparatus (101), e.g. a powered golf-caddy (101), has a reference member (18), a handle (1) adapted to be used to hold and guide the apparatus, and rotary mechanical damping means (13, 14), the handle 1 being movable in a forwards and backwards direction (103) relative to the reference member (18) to produce electric signals (104) to vary the speed of the (apparatus 101), under the effect of the damping means (13, 14) thereby to inhibit hunting. In addition to spring means (6, 8) and a DC motor controller (110) with an acceleration ramp, the damping means (13, 14) is needed to give smooth motion. The handle (1) has rotary cam means (80, 81, 90) to lock it in any position along direction (103), with a 45° rotation either way at any angle. The handle (1) has a fold-flat articulation means (21a, 23a, 84-88) comprising two interengaging cogged parts (21a, 23a), each having a pivot (87), one part (23) a for handle land the other part (21a) for a support member (21) (on the main part of caddy (101)) for handle (1), and a tie (84, 84) tying the two pivots (87, 87) together. The handle (1) can swivel sideways (under rotary mechanical damping means (200a, 210, 210a)) to steer the caddy (101), with a potentiometer (207) to generate electric steering signals (104), e.g. to operate differentially the caddy's wheels (101a, 101b) for steering.