Douglas - you don't really need a dehydrator to prepare food for the trail. I'm one of Sarah's many fans, using her freezerbag style of preparing dinners, but I don't own a dehydrator and don't feel the need for one.
I buy the dehydrated veggies and beans from harmonyhousefoods.com, I use Idahoan instant potatoes, and I dehydrate the pasta, rice, hamburger, and chicken on a cookie sheet in the oven. It really is simple and quick. Sarah describes the process in her book, and also several previous threads here on BPL discuss dehydrating rice and chicken. It's worth giving it a try.
About actual meals on the trail - I've switched to cold breakfasts for the reasons stated above, usually granola with dehydrated fruit, powdered milk, and cold water. Lunch is the usual collection of nibblies. Try making moose goo with Nutella instead of peanut butter! Someone here suggested that, and it's now my favorite (Moose goo - peanut butter, powdered milk, honey, and corn flour - the proportions are up to you). Dinner is a freezerbag concoction with something hot and sweet to drink. Sometimes I'll make a steamed biscuit. Sarah has described a way to do it, or take a look at an older article here at BPL called Groovy-Biotic Cooking for some good ideas.