An 8" flat tip screwdriver 
An 8" Phillip's head #2 
Side cutters 
10" curved vise grips 
10" channel lock pliers 
6" Needle nose 
10" 3/8" ratchet 
3/8" swivel socket 
Basic 3/8" sockets (3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 8mm, 10mm, 13mm, 15mm,  
                            18mm, 19mm) 
1/2"-3/8" adapter 
1/2" breaker bar  
Basic Allen wrench set 
Basic Torx set 
3/8" 6", (2)3", 1" extensions.   
Then if you're doing anything that requires special or different tools toss them in for that trip. When I go to the yard I always go in and look around first to see if they have what I'm looking for. If they do, then I go back out and get only what tools I need plus my side cuts and vise grips. You can dismantle an entire car with side cuts, vise grips and some time.