Richsd,

I think it'd be worth trying in Estes. In my experience, Quercus bicolor (Swamp white oak) is just slightly fussier about conditions and will want a bit more water than Burr. Since you know the Aurora location is not ideal, why not try it in Estes?

Gambel oak would be a safer choice, but they're often small and shrubby, not nearly as majestic as bicolor.

I'd go for it, you have nothing to lose but a small tree. I would get it planted soon, though. Fall plantings are much riskier at altitude.

Barb

Thanks, Barb. Excellent suggestions.