Ah, for that age range, the only thing that comes to mind is a residential program such as UNC's Summer Enrichment Program (SEP in Greeley, CO) or the Center for Bright Kids' summer programs which they seem to be running at the School of Mines in Golden, CO. SEP starts their residential program with kids in 5th grade and has a program for younger kids but it is half day which wouldn't be reasonable if you are commuting from WY. CBK's programs take kids finishing 3rd or 4th grade if I recall correctly.
The thing w/ SEP is that it doesn't appear to have any actual admission criterion other than a the parent answering questions about why you think your child is gifted. Being in a GT program is specifically stated as not necessary for admission and no test scores are requested.
Call me jaded, but it seems like half the people I know think that their kids are really, really smart and the demographics of the area from which SEP draws has a number of schools where more than 15% of the kids are formally ided as gifted. I've had even program GT coordinators tell me that they believe that the large majority of the kids who are so ided are not gifted. Parental rating scales, leadership qualities, high achievement scores, etc. are all means of being so ided.
My kids have never participated in SEP, though, so I don't know what the demographics look like. For my oldest, in particular, we've not found super inclusive GT programming like that to have many other kids with whom she feels a real rapport, however.
