I grill almost every evening as long is it is not pouring out and I like my marinates. They can get really pricy after awhile but so can store bought planks or chips (I usually get hickory). I have an old apple tree on the property as well as what I believe is a sugar maple and a pear tree. I picked up some apple twigs with the bark still on them and lot of lichens. I pulled off the lichens (which probably would not smell/taste so great when they smouldered) along with some of the bark but I am not sure if I should pull off the rest of the bark. I have them soaking on water right now. Is an hour long enough? I plan to grill pork chops for supper tonight. Anyone want to come for supper?