Gravel??? Sure was gravel when I rode it in the rain in 1991. They paved most of it in the following years. Roommate went up in 94(?) and mostly paved by then.
Did Hwy 20....Bella Coola and back last summer and then headed north to do the Nisga'a and then to 37 at Cranberry Junction and some ways North but the weather was real shitty in July. Fine by me....I'll try again next summer.
Be ready for the weather at any time of the year up there.