well i dont know any sites but i do now a few things about gurrrils growing as i do this every year,
watering-paint 5 gallon buckets black or green dark colour u drill 1/8 of a hole in the pail and hang it from a tree near your plants ie plant near some big trees but make sur ur on the morning sun side the water in the buckets should last long enough till u come back to check them then just refill the pails try to plant near water so u dont have to travel with water on ur back going to ur grow site.

site-location- ok try not to make a trail leading to ur plants if u see 1 developing make sure u hide it with bushes if u can see the trail so can others dont plant lots of plants in the same area spead them out 3 per site.when picking a spot for this kind of growing make it hard for other pll to walk into where ur plants would be u got to make them change there minds so they say a nothing here lets go rocky hard to get to areas r perfect.

hole preperation- i suggest u dig all holes in the fall and prepare them with some good soil cover these holes with plasitic or wood then cover that with sticks and bushes so no 1 will see it, and keep the soil good from the winter and rain then in the sping u simply uncover these holes and there ready to go

harvest-i would have to harvest in oct late so the amout of bud would be high u can harvest anytime after sept ur discersion on that remember the buds get big and ppl see big things so u might want to cut them down as soon as the buds start getting big.

i hope this helps u as it works for me