Angelina Changing in a tent wearing a chastity belt is not that bad. The weekly shower without the belt is often a problem because the shower section is often separated by gender. You can maybe solve this problem by showering in the middle of the night in the mans section supervised by your keyholder or you use a family shower but normally this means extra costs, sometimes you don't get them when you don't have kids and you offer need to book them months in advance because many people want them.
Some camping grounds offer to book a sauna for a few hours, they normally have a shower, too. Even if you can't use the sauna with your belt, you have still an opportunity to get a supervised shower.
With Daniel we actually love to travel around and not stay at one place for longer than a few days, so we normally book a cheap hotel for Sunday, so we have enough privacy for the shower and the weekly maintenance session.