I just keep a Packasport box on mine permanently. It will be used pretty often to carry stand up paddle boards, firewood, shovel, axe, an awning etc. depending on what I'm doing. I did purchase a couple platform pieces for it to make it easier to carry firewood in particular. One I got from Sherpa Equipment and one from Cali Raised. The largest sized Sherpa one fits perfectly mounted side to side on the rack. An E series rack likely has slightly different dimensions though but you can probably find that info on Victory's site.