Couple of tid-bits from my experiences making homemade dehydrated meals. Last year was the first year my friends and I tried it out and it was a great success with no food related illnesses to report.
When cooking your ground (deer or other game meat is best because it's lean) make sure you break it up super fine and uniformly while it's cooking. This will take some time but will reduce chewy pebbles when re-hydrated. Once it's been cooked you need to rinse the meat in a colander with HOT water to remove as much fat/oils as possible prior to dehydrating.
If you're going to dehydrate chicken you need to use canned chicken- again make sure it's broken up very well and rinsed before dehydrating. You can also mix in a little hot sauce prior to dehydrating to give your chicken a little kick. One of my favorites is dehydrated pasta, dehydrated chicken, dehydrated kale (crushed up) and a cheese packet from a velveeta type mac & cheese. It's heavy but hits the spot after a long hike. Works well with dehydrated broccoli instead of the Kale too.
Dehydrate all ingredients separately- everything takes different times to dehydrate. Helps to cut all your fruits/veg in small uniform sizes.
Couple that became staples for myself and my friends last year...
Shepard's Pie- Pick your favorite Idahoan Mashed potato flavor, brown gravy powder, dehydrated peas and carrots, dehy venison.
Rice and Beans with meat- pretty self explanatory- just use instant rice and a sazon or yellow rice packet it to make the rice more tasty.
Chicken Fajita Bowls- dehy chicken, dehy onions and green peppers (or japs) fajita seasoning, rice, dehy salsa