Yes, a clouser with lead eyes on a sink tip line should work. A fly line with interchangeable tips might be the most economical approach. Rio makes a versitip line. I have the 8 wht. but you could add a sink tip to a 10 wht line to get a weighted fly down there.
I met three of the brothers on my trip there, and they are solid individuals. Three of the brothers are very knowledgeable fishing guides. The oldest, Dennis, is a dive master and scuba diving instructor. The Lodge's location can't be beat.