I've used Happry Trails rack and panniers on my 2002 LC4 Adv.
Check them out at:
I had over 90 lb. of camping gear packed in the aluminum panniers when I rode acrossed US, including 500 some miles off-pavement.
I had worries about the LC4 Adv. not strong enough to carry heavy loads, but that didn't seem to be an issue.