Unfortunately this model cannot be used with the conversion hose. Any of the mountain series cannot be used with an RV. Let us know if you have any additional questions.
This was made in China.
I would say it depends on your cooker material, as long as they recommend it it should be fine. The other thing to be aware of is cooking space. Make sure the diameter is no bigger than the cooking area: 12.5" x 24 " (302 sq. in. total). So no more really than probably 14". Let us know if you have any additional questions.