If you were wondering why we put such large tires on a trailer, let us show you. First, we made an upside-down drawer. Next, we destroyed it.
Then, we made another upside-down drawer. With a different joint design, this attempt came out much nicer. When flipped over, this piece becomes the counter on which the grill will sit.
We wanted the cooking surface to be at a workable height, which required the use of 30" tires. The ground clearance is nice, too, since the trailer will see off-road use.
We acquired ball-bearing drawer slides 30" long with a 400lbs. capacity from Amazon. These will allow the grill to slide out it's full width, plus some extra for a small work space next to it. Standard drawer slides are used for the inner utensil drawer. These are 24" soft-close type from Home Depot.
Next, we made a smaller drawer to fit inside the upside-down drawer. This drawer-within-a-drawer will be used to store utensils and/or cookware, most likely.