If you want to go for bigger range, why not go somewhere like the C&CC site at Keighley or Boroughbridge, or the CMC site at Scotton near Knaresborough? You can get to Howarth in about 40 mins passing through Harrogate, Otley (or the original Hotton to Emmerdale watchers), Bingley where you will find Damart and Bingley Five-Rise locks on the Leeds and Liverpool Canal. Plenty of other places to visit: Ilkley, Masham (Black Sheep Brewery?), the castles at Middleham, Richmond, and Skipton, Wharfedale, Uredale and Swaledale. York*, and so the list goes on. The caution that I would add is that Howarth is very popular and consequently the site charges may be a tad high, whereas sites further away may be cheaper.
*York has a good and big P+R network, as does Leeds albeit smaller and not so well signposted.
Good luck.