The hike is not at all strenuous. It is very fun, actually. You are talking about the Don Cecil trail, T/H across from Sentinel campground. It is switchbacked well and you will experience all levels of vegetation.
I ran into a bear on the trail a while back, but that was in April and not October. The bear was more interested in termites and not me...
I will miss you by a few days, I am going to Kings Canyon starting Oct. 22.
Have fun, it's a great trail and not at all difficult, it is moderate at best. The water supply along the trail is limited so take what you are used to for a dry spell max of 5 miles one-way.
While you're there the trail up the opposite side of the canyon to the "other" lookout (Hotel Creek) is quicker but steeper.
I am hiking up Bubbs Creek and either will attempt Avalanche Pass or hike all the way to Forester Pass (3 days from Roads End).
Have fun!