If the surface is very uneven, you may have to simply lean your bike on a pole or on the wall. However, if the ground is uneven, your bike might roll and fall. On my way back from Lake Lavon, last weekend, I was at a fast-food joint, where I actually had to lean my bike on a lamp post, because there was no other spot to park the bike, safely.
My click-stand, which I often use on the Thorn Nomad MKII, uses an elastic band to prevent the bike from rolling. I did not have an elastic band handy but the reflective ankle bands fit the bill, this time.
Hope you're having a great week!