We stayed in THV’s a couple of years ago and loved them. They are remote, but that is part of their charm.
The best advice that I can give is to request a unit toward the south end (we requested golf course view). This places you close to the pool, the boat dock, and more importantly closest to the Grandstand. If you have any issues getting a parking spot (we never had an issue) there are always spots open in the Grandstand area. This is just a short walk across the golf course path.
You really don’t want a unit too close to the boat docks though as they blow their whistle every time they arrive or leave. It’s pretty loud if you’re right there.
For the most part, we had the THV quiet pool to ourselves every time we went swimming. Definitely make some time to go swimming. Again, remote, quiet and alone. Rare things at Disney.
Finally, they have an odd bus system. There is a bus that continuously runs from the THV’s to the main SSR Carrriage house area. If you want to go to MK (makes sense by bus), you would need to first right the THV bus to the Springs area. Get off that bus and wait for a MK bus. This gets complicated by the fact that the Grandstand is the first bus stop for normal SSR and the Springs is the last. Many times if the bus fills up, they have to just drive by the Springs stop. The solution to this is easy though. Don’t ride the THV bus, but instead walk across the golf course to the Grandstand area and wait there for the normal SSR bus. As it’s the first stop you’ll have room and are almost guaranteed a seat. When you return take the SSR bus and get off at the Grandstand area and walk home. It is not very long but could save you a lot of time.
If I had a car, I’d drive to HS, EP and AK, but taking the bus to MK makes sense because they drop you at the gate and you can avoid the boat or monorail.
One final thing, don’t expect fullsize adults to be happy in the bunk beds. They are about 6-10 inches shorter than a normal bed.
Good luck. You should love the THV’s. I’d stay there again in a heartbeat.