CKMINI,
ThreeG Farms in Ames, IA, as others have mentioned is wonderful for VSE's! Earl and Mary are both tops in my book
I did the camp last year, and had a ton of fun. If you bring help with you, they should be forewarned...they will be put to work, lol, but since I see my folks so seldom, it was kind of a "halfway" meeting place for us, so we all had a great time. Also did the HDT in June, which had a vse only hazard that was TIGHT. If it is at all doable in my schedule..and the weather cooperates, would LOVE to do their ADT's!
Their website lists the schedule for lessons, clinics, and of course all competitions.
Threegfarms
There's also a good VSE friendly CDE in Lincoln, NE. Generally first weekend in June. Course is fairly level, so good introductory type facility. Had a conflict last year, but have it on my list if possible.
Longview Lake CDE is held just east, and a little south of Kansas City, MO in September. Beautiful location, and plenty of VSE participants..nice ones, of course
WI has one too, and VSE's are welcome. The name escapes me at the moment, but it's another one I have on my list "to do" this coming year.