Spike, I would recommend you get with someone that knows what they are doing and learn from them also get a book on the mushrooms or fungi and learn from it as well. Learn how to take spore prints to indentify your fungi. Here is something I took from the web:
Other Killers and Potential Killers
Several species of Lepiota contain amatoxins; all of the Lepiotas should be avoided, including the Parasol Mushroom, Macrolepiota procera, until you have years of mushrooming experience under your belt and are very sure of your identification.
The false morels can be fatally poisonous, though it is rare. The poison in false morels is MMH, or monmethylhydrazine (a chemical also found in rocket fuel). Though MMH is not understood completely by scientists, there is no question about whether it is poisonous or not. It appears that MMH may occur in different quantities in different false morels (even members of the same species), that its presence may vary according to geography, that its affect on people may vary between individuals, and that its toxicity may be cumulative (raising the possibility of eating false morels safely for years and then, one day, croaking after one bite). Clearly, MMH is not to be messed with. See the pages on Gyromitras for more information--also the page on False Morel Toxicity.
One frequent cause of mushroom poisoning involves people who move from one part of the world to another, then search for the mushrooms they've always eaten. What they find may look like the mushroom they're used to, but it may not be the same thing! This kind of tragic poisoning sometimes occurs when people move from an area where wild mushrooms are more commonly eaten--like Korea, or Eastern Europe--to the United States and Canada.
Check out this site:
Great Mushroom Place I have already picked a few Morels this year and probably will go out tomorrow if it rains. Maybe if I get time I'll take some pics...