I'm not sure I'd go that far from home and hospital, just in case. You never know what baby has planned, or even how you'll feel at 35 weeks. If you can map out a route that leaves you with good access to hospitals and you live somewhere where there isn't a big risk of winter weather stranding you, it could be doable. I'd see what your doctor has to say about it.
We did an earlier babymoon, but I've considered doing something local, like a room downtown for a night, or a B&B near the city, if something like that is an option?