Plan the soup/stew of leftovers first. All the veg & seasonings.
Got a cauldron to cook that in?
For a spit to do haunches of beef, we use a 2x2 square pole of wood.
That way, you can rotate the beast 1/4 turn with little effort.
You cover all of the exposed wood with aluminum foil so it does not burn.
Aluminium foil will work just as well. Get the heavy duty thickness, if you can.
I lived in a summer lakeside resort village. We did 50 - 70 kg beef roast = "Beef On A Bun"
as a community fund raiser. Salads and spuds. 250? tickets?
Big dance on the tennis court to finish up. Helped on the BBQ for a decade before I left.
Got seasonings worked out? Got a basting liquid planned?
Lamb should make really greasy jerky, even worse if any is made into biltong.
Opposite ends of the fat scale from game, even beef. I'd pass on even a taste.
If I win our lottery tonight, I'll be over for a visit and a feast.