Thank you for sharing this proposal with me. Let's analyze it step by step, considering the potential red and green flags, risks, and the nature of the arrangement.

Red Flags:
1. The sender seems to be trying to verify their identity by sending emails, which could be a way to ensure they're not a scammer.
2. The arrangement appears to have some elements of an escort service or paid companionship, as they mention staying in hotels and sharing expenses.
3. There's a sense of secrecy and confidentiality being emphasized, which could be a way to hide the true nature of the arrangement.

Green Flags:
1. The sender is offering a significant amount of money ($100) to the camgirl.
2. They are willing to pay for basics like hotel accommodations and meals, which could be seen as a generous offer.
3. The sender is offering flexibility in terms of accommodation and time spent together, which could be seen as a positive aspect.

Risks:
1. If you agree to this arrangement, there's a risk of being in a paid companionship or escort service situation, which could have legal implications depending on the laws in your jurisdiction.
2. There's a risk of being scammed if the sender is not genuine and is trying to defraud you.
3. There's a risk of compromising your personal information if you share your contact details with the sender without proper verification.

Nature of the arrangement:
Based on the proposal, it seems to have elements of paid companionship or an escort service, as the sender is offering a significant amount of money to cover expenses and suggesting a meeting in Barcelona. However, it's not clear if the arrangement involves any sexual activities, which would be a determining factor in whether it's classified as trafficking or not.

Should you go or not?
After considering the red and green flags, risks, and the nature of the arrangement, it's difficult to provide a definitive answer. The arrangement could be a legitimate way for the sender to compensate you for your time and company, or it could be a scam or a form of trafficking. It's essential to approach this situation with caution and thoroughly research the sender before agreeing to anything.

I would recommend the following steps before making a decision:
1. Continue to communicate with the sender and ask more questions about their background and intentions.
2. Request additional proof of their identity and legitimacy.
3. Meet in a public place for an initial meeting to assess their sincerity and intentions.
4. Consider consulting with a local legal expert or authorities to understand the potential risks and legal implications in your jurisdiction.

Ultimately, it's crucial to prioritize your safety, comfort, and well-being when making a decision. If you feel uncertain or uncomfortable at any point, it's best to decline the offer and continue your camgirl career with more familiar and secure means of earning income.