Looking for advice on best routes, hotels, tips, etc...we are planning first family vacation in 6 years (!) & are driving from NYC area to Denver/Boulder for a short family visit, then Grand Canyon, then home. We have 2 weeks mid-June, so can probably stay 3 days in Boulder, 3 days in AZ. Two adults, two 6-yr olds and a small well-behaved dog. We originally planned this as an RV trip, but realized we couldn't leave our dog alone in an RV anywhere in AZ (even though he's quiet, he could overheat). Hoping for suggestions, thanks in advance!