Growing up in trees?

I am planning on growing (my first time) up in trees, and am wondering if anyone could offer some feedback as to my plan of attack and possibly offer any suggestions. Thus far, this is what I have ordered for supplies:

3 self-watering patio planters that are 33"L x 15"W x 14"H.
Advantage Green camoflague fabric.
Greenhouse-style plastic film.
Portable climbing stick, 12' tall (used by hunters to get into tree stands)
4:1 ratio hoist w/ 40' of rope (used by hunters to lift animals)

My thought is this: position planters in 3 different trees,about 15-20' up each tree, in somewhat close proximity to each other. Each planter would be covered in the camo fabric to avoid detection from below. Put a small fence up planted inside the planter and wrap this in the plastic film to add security from prying eyes and from squirrels, rodents, etc... Use the hoist to lift heavy items up and down from the tree.
This is not the cheapest route to go I know, but in theory seems rather safe. What concerns should I have trying to grow in trees? How pesky are squirrels, bugs, etc...? How visible are your plants from below (or above)? Any suggestions would be greatly appreciated.