Exorcism gloves with the sigils inlaid on the palms. This should be part of the kit of every mage, druid, healer, shaman, whatever. If your LARP has possession as a possible attack then you need these. - Arcanepunk: Exorcism Handwraps by TormentedArtifact
Unless you are actively learning primitive survival skills or studying bushcraft techniques, no one has any intention of deliberately putting themselves in a situation where they have no choice but to rely on their wilderness survival skills.