I read the notes the site gave about starting a wood fire and starting a charcoal fire. I've used my smoker several times (Horizon Marshall) and each time I've had trouble with the cooking temp. I've been starting out with lump charcoal and then adding wood when the coals are glowing to get the smoke. Is this good? It's hard for me to get a lot of wood for a low price because I have to get it off the web. Anyone have any ideas?