Joe,
For all intents and purposes, Ballyneal is walking only.
Green to tee walks are the feature where Renaissance Golf most exceeded my expectations. There are no awkward green to tee transitions; it all fits quite nicely. Grassed walkways have been established. Some walks are really short. The 5th tee is nearly an extension of the 4th green. Others, like the walk from 14th green to the back tee on 15, require about 100 yards to get into position. I'll guess the average walk is 50-60 yards.
Tom D. will probably answer this question about maximum elevation changes. I'll make some guesses. The course starts about 30 feet above where it finishes. The maximum elevation change on the property is about 150 feet, and the course elevation change is about 100 feet. The biggest elevation change on the course is the shot from the back tee on the par 5 4th hole, which is maybe a 70 feet drop (the walk from 3 green, around a dune to 4 tee, is dramatic). Other than that, holes play 5-30 feet uphill and downhill, and typical shots on the course will play no more than one club more or less for the elevation change. I hope that's close.
I don't know what the expected time will be, but if you're taking over 4:15, you're too slow. Another member and I played the course last September in 3:05 and 3:10. Granted, there wasn't much putting going on, but we played the whole thing, and we weren't rushing. This is a 4 hour course.
The weather in eastern Colorado is quite volatile. In March or September, it can be 85 degrees, or it can snow, sometimes in the same day. Tentatively, Ballyneal will open each May, and close in November. The club has an active and ongoing bird hunting program, so the course will stay open a little later in the fall.