Very few bugs... If you had given me the conditions we had (38-42 degrees, overcast, some very sproradic mist/slight drizzle), I would have bet my bottom dollar on some olives... perhaps they were there and we just were in the wrong locations at the wrong time, but we never positively saw one. there were about 4 risers we saw all day, but they were one time risers - see them once, and then they were gone.
DaveS had noted that the water temp on the river dropped considerably just before our visit (snowmelt), but all 4 fish we caught were browns... no bows. The fish were fairly lethargic (except while trying to photograph) due to the temps... the fights were good, but not what you would expect from fish of that size. Two of the fish took pretty deep (not to the point of harming the fish, mind you, but they were ordering dinner when they took).
It was also interesting to note that some of the fish had VERY few spots and others were nothing but spots. Both very pretty in their own ways.
troutbert - albies was over 20"... DaveS's was 17-18