if you made some kind of cage/fence, you wouldnt need to worry about squirrels n shit, make some sticky traps and check/change them often, to see if you have any pests, the odd spray or two of neem oil around the area should help too, - remember to find a branch strong enough, with all the stuff up there it could easily break.. and that would suck...

i cant see it being too hard... give it a go and keep us posted...