Tour Operator Margin Scheme

My company is looking to run some events in Paris and charge an attendance fee. The majority of the attendees would hail from the UK.
We were looking to charge one fee that included attendance at the event, and all travel costs.

Am I right in thinking this comes under the umbrella of TOMS?
If so, I believe we cannot issue Vat invoices, and do year end calculations to work out the Vat?

My main question is that when we start receiving booking forms, can we raise an invoice with mention to the TOMS scheme, but make sure Vat does not appear anywhere on the invoice?

If we cannot raise an invoice, what do others do?