The host site has to provide suitable opportunities for that exchange, yet they must do so in consultation with the reenactors. It is sometimes easy to forget that the latter have their own needs for privacy and peace and quiet. Reenactors are on their vacations and are dedicated volunteers, not employees. They deserve to be treated as such - excessive scheduling can only backfire. A site's motivations and those of the reenactor are not always the same.
Tactical demonstrations are a case in point.
Reenactors are looking for a safe, interesting and enjoyable event. The site also wants this, but for the public as well. The wants are not exclusive yet some degree of compromise may be necessary. At Louisbourg, the available demonstration field was relatively long and narrow. The tactical had to be carefully discussed and coordinated with the reenactors to ensure both safety and interest.