Guerilla Grow questions

Posted this in the cultivation section but didnt get any responses...
\nDoing my second guerilla grow this year and I have a few questions.
\nI have three plants that just sprouted a few days ago (bagseed) and they're still in red solo cups filled to about an inch from the top of the solo cup. I have a dilemma because Im going to be gone for 3 weeks in just a few days and cant tend to the spot. So what I have been doing until I leave is I put a mini greenhouse on top of the 3 plants and water every time the soil becomes dry. Tomorrow I am going to dig holes and put fertile soil in the holes to about 2 feet down and transplant them into the ground;
\n-how far apart should each plant be from the other 2 plants?(worried about roots getting tangled)
\n-is a 2 foot hole deep enough for each hole?
\nAnother concern is since I'll be gone for 3 weeks, I am worried about them not getting enough water and drying out, but since they're only gonna be a week old they are small and won't need as much water, atleast I theorize. I have chicken wire fences around them for protection. So some more questions I have are..
\n-will just a chicken wire fence about 2 feet tall be big enough to protect them? 
\n-are week old plants simply too young to be out on their own with just a fence protecting them? The spot gets decent sunlight but I have to trim it up so it receives more sunlight but since they're young and relatively not hardened up yet, I figure I will keep some shade so it gets relief from direct sun until they are alittle older. I don't think a lot of time in the shade will be a bad thing since they're so young.
\n-the surrounding vegetation seems to be doing pretty well so I think my plants will be able to survive with only rain water, but what do you think?
\nThanks in advance for answers.