I just posted Robert's obit and death certificate to my tree to show my sources as to where Robert was buried. His wife Ina was the informant on the certificate. As far as I know, Robert and Ina never had any children. The 1910 census entry of 2 children might have been a random mark written on the census form. Ina did get remarried after Robert's death but I could not find her grave. I have yet to order her death certificate. I did notice that some of Ina's relatives are buried at Burnt Fork, WY. It made me think that Robert's grave might have been moved there. Yet, I think in all probability that his remains are now under the waters of Flaming Gorge due to the likelihood that his grave went unmarked.
Thank you for looking into this