Start your seedlings in plastic or foam cups filled ¾ with good poting soil, and no ferts. Filling the cup only ¾ full is key, it allows more space for a larger plant when you put the lid on. Plan to veg for 1-2 weeks from seed 1 week from rooted clone. When your ready bring them to the plot, Tape another cup on top of the cup with the seedling (or clone) around the lip and stack them into a backpack. Normaly you can fit anywhere from 20-35 per hiking backpack depending on the cup size. You may need to tape all the cups together so they don’t tip and roll around loosely.
I found coco coir is a great substrate because it’s so compact then expands in water. One small 3x4x8” brick will expand to 2 gal. Here’s some info on it,
http://www.greeneem.com/cococoirpeat.htm . Get it from your local petstore its sold as reptile bedding. It might not say its coir but that’s all reptile bedding is. Or you can get it at hydro shop for cheaper I heard but im not sure if its a brick cuz ive never gone to a hydro shop. The only downside to using coir is it needs to be expanded in warm water or cold but it akes longer. Breaking the coir up with a knife by spliting the layers makes it expand much quicker. You’ll need a good waterproof garbage bag doubled or even trippled up to expand it in. After its all expanded bunch up the coir and squeze out the excess water.
Other amendments like verm, peat, pearlite work well but they take up allot of space in your bag. One brick of coir can fit into a backpack pouch, while to have the same amount of peat it would take up ½ backpack alone.
For soil additives try to not use blood and bone meal unless you'r carefull not to get any on the surface. Make your soil mix, fill the hole leaving about 3”, then fill the remaining with amended soil with no bone or blood meal. Animals think bone and blood meal is a carcass so they are atracted and dig. They'll dig into your soil and the most harmful thing for your sake is It may attract bears, if you live in bear country.
You could pre-compost your bone and blood meal for a month or to to get rid of the smell. Mix it with some composted manure, compost, or just topsoil in a bucket with lots of holes drilled in it for air. Keep wet and warm for 2 months. Then youll have a single bag of goodies and just mix that in.
(Note: N-P-K is nutrient values standing for Nitrogen-Phosphorus-Potassium. Its labled on ferts as #-#-#)
Instead of using bone or blood a much safer way is using bat guano's as an additive and later as a tea. Desert bat guano or any other even N-P-K or high N and K but a medium-low P is great for starting your plots and making teas durring veg because of the high N. Once in flower (around august) switch to high P low N teas for more flower production. Or similar NPK guanos, whatevers avalible.
To make tea's put 1-2 tsp of desert guano per gal of water or 2-3 tsp of fossilized seabird guano. Shake well and let it sit a bit if you can. The higher N of dessert guano will limit the amount per gal because you may burn the plants from too much N while the low N of the seabird guano allows you to give a stronger dose of P without burning from the N. A general rule of thumb is indicas are more sensitive to too much N and sativas are the oposite, so if you have multiple strains you may want to make a mix for each type.
You should try and get all the trace minerals into the soil. Greensand and/or kelp are great for this. Lime, or better rock phosphate for slow release over 5 years should be added in to bring the acidity down from the guano. You can pick up rock phosphate from hydro shops sold as "peace of mind" company rock phosphate 4lbs for $7. A bit of wood ash can help but use sparingly, one pinch per plant is good since it can cause toxicity even in low concentrations but it still is beneficial in small amounts.
A good pitchfork, hatchet (roots), and a spade is all you should need toolwise.
Here is a good link for the nutrient values of most additives and amendments,
http://plenty.150m.com/My_Links_Page..._manure01.html