We wore hiking sandals on trails of the ancients. THey strap on a little better than flip flops. The bus takes you up to Belvedere and you walk down. Easy walk, not too fast, not a smooth, raked surface but a path thru a wooded area complete with tree roots and branches.
It did not rain while we were there (june).
If I remember there were outlets for both American And European appliances in the cabin.
My husband got sick in EVERY SINGLE 4 X 4 even when he rode in the front with the driver. After 2 disasters we cancelled the rest of them. He gets car sick if he tries to read while I drive but he can read in a plane.
I did not need sweats but I do have a pair of work out pants made from t-shirt material instead of fleece. They would be good for when Ted wants the AC cooler than I do.
Hope this helps. Enjoy the trip and report back.