Your wheels arent big enough... Many clubs have ####ty terrains and large wheels are crucial with 50lbs of gear loaded on.
Also, having something that collapses with removable wheels is great too.
Mine was a $40 baby running stroller and $40 in clamps from Royal distributing
I've only been to one match and though the terrain wasn't terrible, any soft dirt, hills, or hills with soft dirt made transiting between stages an absolute pain in the buttocks for some folks.
With my limited experience with comps, I learned that small wheels made life difficult for their owners. Not impossible to get around, just a bit of a pain. If you're using a running cart, I also found a front wheel that turns is helpful, lol! Trying to turn a trike with 50-75lbs of gear on top wasn't easy, lol!
Some pics of the rigs folks were running in my squad:
https://3.bp.########.com/-5CCamNnd_-U/V3s1bu6IbvI/AAAAAAAAivo/yOtTvXMfP3kCUe1mMDl8yTIQsKKwiR_NACKgB/s1600/P7025785.JPG
https://4.bp.########.com/-oAUrMTp66RM/V3s1bqVUY2I/AAAAAAAAivo/pCYrhokuxs88Doz689jFxmEOON27zjNYACKgB/s1600/P7025786.JPG
https://4.bp.########.com/-OwSo6t9tWb8/V3s2LkUk-TI/AAAAAAAAixY/IoiqYTL7-DwTrinBv3Cx9AD3tz3hexIZACKgB/s1600/P7025845.JPG
https://4.bp.########.com/-nmGV_xyyH5c/V3s5tSZhCcI/AAAAAAAAi54/zDnnLVEU410iDXiEuOvU30WwL5T7sud3QCKgB/s1600/P7026177.JPG
https://1.bp.########.com/-NRB57XyzCgk/V3s9NjonuTI/AAAAAAAAjBk/Mj9yD1bqtycGbsYByy9Y2xMMV4Ui2_p5QCKgB/s1600/P7026431.JPG
Sorry I don't have better pics