I did a quick Google search, and found this on e-bay.
Anderson Conector It is already sized for #6 wire, and you can put in wire from #10 to #6, and clamp it firmly with a bench vice, no need for a oversized crimper. Just make sure you can still assemble the wire connector into the plastic fitting afterwords.
I might also use a 12' long #8 gauge jumper cable for the camper end of the wiring - you can buy that size jumper cable from Harbor Frieght for about $15 when they are on sale. This keeps the wire neat, and will conduct over 50 amps in your use.
Fred.
