Man, you guys take this too seriously. The OP did say LOCAL CLUB SHOOTS. If his are like most of the ones around my neck of the woods they're just fun shoots. No sanctioning body or a lot of hoopla. You shouldn't need a truck to carry so much stuff.
I go to at least one LOCAL 3D shoot almost every week and it's for fun. As such a carry all my stuff in my bow case and a small fishing tackle box. Never being too far from the vehicle I don't carry any tools other than an Allen wrench set (yes, I get some loose screws, too). If something really drastic happens it's time to quit and sort it out.
So here's the list of stuff I carry during CLUB shoots.
Arrow puller (sometimes)
Arrows (3)---sometimes in a hip quiver, sometimes just in my right front pocket
Swarovski bino 8x30 (sometimes)
Martin shirt/Rytera hat
I ain't goin camping for the weekend so don't need all those other frills. Guess it all depends on how serious you can get and how far you have to travel. Me? I have 20 archery clubs within 35 miles of my house. Umbrellas? Rain gear? If it rains I'm done ro don't even go. Chairs? Stay home if you just want to sit around. In other words, most local club shoots are pretty informal----and a lot more fun than the big sanctioned shoots.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver