Wonder how many teams will opt for a road trip forgetting about toll roads, or swinging through Belgium, Luxemberg and Switzerland to reduce toll roads and then incurring higher fuel fees
Really? I think you credit paintballers with less intelligence than I do.
Most route planners and satnavs will alert you to the fact that the route has toll roads, some will even calculate costs.
Switzerland has toll roads too, you need to purchase the annual 'vignette' before using the Swiss expressways, the alternative routes may be highly scenic but will also be highly time consuming, plus, depending on your planned route there maybe tunnel tolls to pay on top.
From Calais using the French motorway system its about a 12hr drive, before stops, and with a car full of paintballers each stop takes about an hour.
Your alternative route would take about another 4hrs driving. Teams will need to be on site the afternoon before play starts for registration, so this will probably add at least another two nights accommodation for the return journey and extra time off work etc.
Some might consider it an alternative to flying, others may not.