Thanks guys!
Oh the boys had a blast for sure, so did dad! I'm so relieved they actually love camping but they started early... I took my first boy on a 5 weeks trip across Canada when he was 6 months old (i think that's when my dear wife gave up on roadtrips!) and another identical trip with him without mom when he turned 2 1/2 years old. Much easier without mom!
;-)
As for the rig she gets about the same on veggie or diesel. I don't really check since I basically drive for free but seems similar, same for power.
And yes, Expo was part of our trip from Vancouver BC along with GoneMoab... Fun time!
Cheers
Mr. D