The only straw bale type shoot around Whitby around that time is the one at the jolly sailors pub on the a171 between Whitby and Guisborough ( 2 man flush) it’s usually around 28th December. Apart from that there’s Cottondale shooting ground near scarborogh ( pricey but good targets) open practice on a Sunday or ring and book for weekday and Saturday. And there’s Thimbleby shooting ground near Northallerton, can be busy at weekends and holidays, both a bit of a drive but I would recommend Cottondale
regards
mark