Last year [AFIR] they had a whole non-radion day a week & it all worked well enough. Customs can still be available if correctly notified.
If what they're doing is to keep 'Tower' overheads down & continue operating the airfield viably, we Brits will benefit by continuing to have an early cross Channel haven.
Calais could be my preference as much less formal and so on, but usually entails a detoured route when aiming for a southern destination e.g. Chavigny.
Albert might do at a pinch, but the best place - until Douane stopped - was Abbeville, nicely on my favourite southerly route & avoids the strong seaside winds that I found more often than not at Le touquet.!