An interesting topic which covers a number of issues. I am of the view that an organisation's executive must be allowed to manage it and, if they are not doing so to the approval of its stakeholders (I am being very careful not to use the 'business' or 'shareholder' words!), they should be removed. But they cannot be subjected to constant micromanagement so choices such as sponsorship etc must be delegated to them. They can be held to account by some form of non-executive oversight and, ultimately, by its stakeholders at an AGM.
I'm not so sure about whether a professional marketing person would view sponsorship of a TV Leisure Vehicle Show as more beneficial than something only indirectly related to caravans/motorhomes. They might argue that the majority of viewers of a TV Leisure Vehicle Show are already in the hobby so are not the target audience. However, viewers of a motorsport show might be a better target audience as they could be persuaded towards a leisure vehicle to use on visits to circuits (as I do for example). The choice of where to advertise or sponsor will be informed by multiple data including demographics, size of audience, propensity to purchase and much more.
Just an alternative view.