Get a Knipex wrench plier (or one of the copies) with a suitable length handle if you need lots of wrenches. Better grip than wrenches, ratcheting action unless nearing the plier max size limit, and of course a very nice plier for holding or parallell pressing stuff. And of course smaller and lot lighter than lots of wrenches. (If space is limited there is a 250mm/ 10" narrow head version too).
(I do think the wrench action of that thing will work, but not so sure you wouldn't be better off with a SAK or multitool for the rest of it?)