Nice find Bob! Thanks for sharing this.
Yep, I was thinking about going on a foray either this week or next. When the apples and lilacs are in blossom and the cottonwoods have leaves around the size of dimes to quarters, the yellow/white morels are starting to appear.
Paul, there are poisonous false morels but they are easy to ID when you get the hang of it. Until you know just by looking the best way to know is slice your keepers in half lengthwise before preparing. In a true morel the inside is completely hollow and the cap and stem are a continuous line on the cross-section. (actually there is a morel called a half cap or half stem or something like that but I've never seen one, and for most people they are not common) In a false morel the cap sits entirely on top of the stem and the stem contains at least some cottony fibrous material inside.
Google "False morel" and look at the pictures. There will be plenty of pictures of both true and false morels.
This link is one of many that explain it well.
http://botit.botany.wisc.edu/toms_fungi/may2002.html
I had fantastic luck in a previous forest fire area for 3 out of 4 years following the burn. The one bad year was a dry year. I would foray for about half a day and bring home around a half a bushel. My best year ever, I brought a large paper grocery bag 2/3 full (these were my extras!) to a fine Italian restaurant that specialized in fish dishes and traded them for a four course meal for my wife and I and a very nice bottle of wine. Both parties walked away grinning from ear to ear.