I would go ahead with Blackpool!
A call to ATC will get you the 50% reduction on the Landing Fee, and coming in from Sherburn you could come stright down the ILS or even get a practice SRA. It is worth checking with ATC when you Pre-Book if there is any charge for an SRA followed by a normal landing. I don't think there would be, but you never know????
I would also call one of the clubs on the airfield and see if they can tell you about whether a handling agent is required. ANT flying Club would be my choice. 01253 345396. Speak with Russell. He was very helpful last time I was in there.