Most baby joggers are only rated for a 50lb child. A double jogger will be rated for two 50lb kids---probably not enough for a full-grown deer. They still can be pretty handy though. I picked up a double jogger for cheap on craigslist, and used it a few months ago on a 4-day hunt. The public land forest I was hunting in is landlocked and, while I had permission to cross some private land, I couldn't get a key to the gate. My buddy and I hauled in two 5-gal jugs of water in the baby jogger for 5.5 miles. Once the road ended, we had to carry them another 3miles, but it made short work of the road walk. Going in a week later to camp and hunt, I used the jogger again to carry my pack on the road walk, which saved me a lot of work. Brakes on the jogger really helped to control it on the descents. If you decide to DIY a cart, be sure to add some brakes.