All thermal bathing establishments have poolside showers, but if you have never experienced the itchiness of not showering off the thermal water after you've bathed in it, you don't realise how important it is to shower it off. Our hotel in Abano, Hotel Roma, was a very good hotel, but even so I found their complimentary shower gel wasn't powerful enough to wash away the thermal water, so I had to go out and buy some shower gel. During 8 days I got through about half-a-litre of shower gel.
Wear proper footwear. Monte Venda is a mountain, and requires good grip.
Carry water, you will expend a lot of energy while climbing, and lose lots of body moisture (sweat).
If you get tired, stop and rest. Don't allow yourself to be pressured by younger, more fit participants. We sure as h... didn't.