My husband & I did the back country 4x4 tour with our good friends, a family of 4. At first, we balked a little at the price of $110/adult & $100/child, but boy, were we happy we did this! Doug & Charlotte were our guides in two vehicles. My best friend & I went with Doug, & the husbands & the boys went with Charlotte. Doug was super-knowledgeable & interesting--what a life he's had! And Charlotte was perfect with the little ones (9 & 10 going on 20 & 21). They were a bit jaded going into the tour, but by the end, they were incredibly engaged & were anxious to do more hikes in the other parks the following days. Yahooee! (Thanks, Charlotte!) We saw several formations up close; climbed into the Eye of the Whale arch & got up close to the Marching Men. The views they showed us were breathtaking, & they took us to the Windows for sunset. It was perfect. Bathroom breaks were perfectly spaced, & they even provided some yummy healthy snacks. We would highly recommend this tour & Navtec. Did I mention they picked us up & dropped us off at our hotel? The Best!