Thinking about it, there should only be one movement in and one out of any leaders aircraft and apart from President Biden none will likely be using any aircraft needing massive runways. The biggest issue will be security whilst stored. To avoid turning NQY in to a fortress, logistically it would surely be far more secure to use an existing military base such as Culdrose, Chivenor or even Lyneham then simply helicopter to the golf course right by the Hotel. Lyneham is a long way away and I have no idea the range of helicopters that could fly to Carbis Bay quickly so that maybe not practical. Culdrose is about half the distance in road time from the Hotel than NQY so another reason it may be more suitable. NQY to Carbis Bay the access roads are arguably better but even from Culdrose they are not a problem.
There are many local rumours about making changes at NQY, spending hundreds on upgrades, but, these must surely be just rumours. Where NQY will of course stand to earn real extra revenue is from the hangers on, press, support teams who will be flying in and out commercially in thousands.
We will see what happens the only thing I would recommend is avoid taking your holidays that week.