The trail from the Inn to the river is mostly flat(ish) hard packed earth, some crushed gravel, and is wide enough for the park ranger vehicles. I will help you lift your gear over the gate at the entrance, if it won't fit through. You should have no major problems with the jogger. There are hills, but the trails are fairly easy. On the other side of the river there is a major staircase, I WILL NOT help with those babies, simply because I will not be climbing them myself. There are easier, but longer, ways up on other trails.
I plan on going back to the park this weekend. A wooden bridge over over the railway tracks was being replaced and I want to check on it's progress.
Anyone who comes on the tour and requires some assisstance with luggging of gear, I will help as much as possible.