Yes, absolutely. Private tours are designed to be flexible. Minor adjustments can usually be made directly with your driver-guide on the day, such as extending time at one stop or skipping another. Any major changes that would affect the duration, involve new entrance bookings, or significantly alter the route may not be possible without prior arrangement.
Your guide will review your requests at the start of the day and confirm what’s feasible based on timing, logistics, and road conditions. As long as the changes remain within the same tour duration and region, flexibility is always encouraged.