You'll have no issues. I brought 35 rolls of 35mm film with me in December-January 2008-09 (beautiful time of year), and shot loads of people-pictures. On a guided tour, you've got it even easier than I did, wandering around alone and being mistaken for a local girl.

You probably already know this but the elections are now Nov. 7th. I doubt there's anything anyone can predict, but it wouldn't hurt to check with your tour agent if there's any special rules in effect, i.e. changes to itinerary, things getting canceled, etc.