
Chainmailling is of course portable IMO. As long as I have a clear idea of the weave I'm attempting and have somewhere flattish for jumprings I'm usually happy chainmailling al fresco.
It's usually best, if you are supposed to be minding a child, to have a set up that is easy to put down as soon as the first wail for assistance comes thru. For this reason, always identify the start of your weave with a paperclip and be ready to scoop everything into a bag when you resume motherhood.
orbital weave and serpentine choker available here