Almost forgot, this is a very easy way if you can find a swampy field that gets a lot of sunlight. Thats wet but not underwater. Bring a folding shovel,small folding saw and canvas bag (to carry dirt). Cut some old logs and make a 6x5 ft rectangle in the wet field.
Dig a bunch of dirt from the surrounding area and build up a raised bed inside the cut logs. Dig holes in the raised bed dirt and put in your good soil mix w/oscomote ferts. Plant your fem plants…water, then camouflage the raised bed. (spray logs with cheap cologne from the dollar store to repel critters)
Come back months later and harvest your plants. A lot less risky and much easier. Just assume nothing will be there and a big surprise if there is. (usually there is)