Wow! That sounds like an awesome pace!
Ours are usually 5-8 miles. We have three paces you can choose from to simulate hilltoppers, 2nd field, and first field. So the hilltoppers go later and mostly walk and trot. The medium pace is mostly trotting and some cantering, and the first flight is like a true hunt field, mostly cantering and galloping. there are a good number of jumps, usually around 30 or so.
I love them. I also feel lucky because the girl i ride with knows the owners of the one fixture. So we go out and school out there all the time when the weather is nice.
BUT, i don't think there are any 3'6 ones out there.
i think they max out right around 3.
we'll just have to get you a helmet cam!