Depends on how far you drained them. Lipos have self discharge, it's just very very slow. The purpose of the storage charge is to prevent the battery from going below 3 volts per cell and being damaged. If your battery hits the LVC on your last run, you probably want to put some in there just to be sure, but a full storage charge isn't needed. leaving too much charge increases the lipo's self discharge rate, which is why the recommended storage charge is around 3.8 per cell.

When I race, I just leave the pack where it was after the main till next week unless I break or don't get to run, in which case I discharge it to at least the storage charge level to ward off high self discharge rates over time.