I found the answer to this burning question! Rather than let the giant dragon corpses pile-up and pollute the countryside, there is a great new service for adventurers: Dragon Disposal!
Yes, one quick call and a truck comes and picks up the corpse for a nominal fee. So quick and easy.
Humor aside, this is a real company but the gaming humor value was just too tempting to pass up.
Trask, The Last Tyromancer