Prepare by knowing what weeds to expect in the areas you visit. There is a lot of information available on-line. To get started, visit The Nature Conservancy's Wildland Weed Management website, or the California Native Plant Society's big list of weed links , or the Invasive Plants of Canada Project website. Remember to bring along a garbage bag and gloves when you head out for the day. If using livestock, feed them Certified Weed Seed Free feed before and during backcountry trips.
Animals can spread viable seeds after ingestion.
Using equipment in or walking through weed patches will help weed spread seeds. They'll stick to your vehicle, tent, shoes, and whatever else you have, and hitch a ride to a new spot. Stay on designated roads and trails - going off the beaten path helps to distribute seeds and creates disturbances where weeds can spread rapidly. Use established campsites when possible- new campsites create disturbances where weeds can thrive. Try to get the whole root.