Heavy artillery is often decisive in a battle, so it makes sense to take it out of commission as soon as possible, if you can manage it.
If this involves attacking it hand-to-hand, so be it.
GM: Chewie, you're with the Ewocs Widdle and Wunka. You see this chicken walker chasing some other Ewocs.
Chewbacca: We need to take out these heavy units. Perhaps if we capture one...
Wunka: There's one!
Widdle: Here, chook chook chook!
Chewbacca: It's hard enough catching chickens when you're bigger than them. These ones have 5 metre legs.
Leia: But everyone gets to share a drumstick.
R2-D2: Wait. These Ewocs are Widdle and Wunka? And we had Wicket before. Do they have some sort of W fixation?
GM: No, they're perfectly normal names. Wunka is a wily and wiry warrior, and Widdle is Wicket's widdle brother.
R2-D2: You're kidding me.
GM: It's all written in my notes. I'm not just making this stuff up!
C-3PO: You know, it's your job to just make this stuff up.