If you can find them, the old Bushnell Custom Compacts are a great choice. 6x25 and 7x26. They are a small poro prism design and very bright and clear. You will give up a bit during first and last light, however, I won't be shooting at anything in those low light conditions so it's not much of a bother to me. They are small enough to fit in a coat pocket and easy to always have with you. Any binocular you own won't do you much good in the truck.
If you want to go up a bit in size the Vortex Viper 6x32 are another consideration. I have a set of Swaro 7x30's and use the Vortex binocular much more often.
Last edited by tunes; 03/27/15 08:16 PM.