Can a 6'2" linebacker body-type and his little DW sleep comfortably inside, or are they best for hauling gear?
Absolutely you could be comfortable. Mine's a king-size bed + gear hauler (6'-wide, 81.5" floor). The typical teardrop is 5'-wide (queen-size bed) and the smallest are generally 4'-wide.
Teardropping has transformed camping for me. Far more comfortable and secure sleep, permanently packed and don't even have to un-hitch so can arrive at camp late and there's no setup.
Many are home-made. Mine is made by the only manufacturer with dealers around the country and overseas. Quality and price-wise it's roughly the Chevy-Ford of the teardrop lot. The Cadillacs are "Camp-Inn" and "So-Cal."
Here are some teardrop links:
http://www.mikenchell.com/forums/http://www.tinycamper.com/http://www.socalteardrops.com/http://www.golittleguy.com/teardrops/http://www.amazon.com/Teardrops-Tiny-Tra...0823&sr=1-1