One of the bears was a lot closer when we saw him than a grizzly bear should be. We were, however, never threatened in any way. The general consensus was that the bear were more frightened of us than we were of him. Insects were there too but they were not bad at all. Carry some insect repellant and the back up bug net for your head, and you may not get even one bite.
Topo maps are available and highly recommended.
With a compass and a little practice you will know where you are at all times. Be aware that magnetic north there is 41 degrees East of true North. Climb at least one mountain. The view is magnificent. Layers of clothing are the key to comfort.