On this video you can see the standard 2.4m whip in action together with the Clansman counterpoise kit. EA1AQ/P (Juan) makes a QSO with Swiss station HB9ESA (operator: Rico).
We only used 3 out of the 4 radials available in this kit (you can see the unused spool on top of the table. Despite the very strong QRM from some digital transmission, the PRC-320 did the job. The 1.1Ah battery you see on this video is also more than enough for a day of operation.