If you dig your holes near a water source when the roots reach the water level it will water itself. A lake for example would saturate the ground at its water level for many feet from the source. No more watering once the roots reach the water level but a rise in the water level can present problems. For hiding trim the ends of leaves and keep small by making sure they will flower the day you transplant them. Like on April 1st. For the barbed wire effect If possible I would transplant some thorny vines over your plants be sure to keep leaves trimmed on the vines so they will not block the light. If you start your plants indoors for one month when they become little plants and not seedlings they are much more likely to survive and not stretch and die.