One in leeds is bang in centre, very easy to get to and if you can get a train just a 10 min walk if that. Bradford one in Little Germany, plenty of parking around it and not that expensive. Plenty of £2.50 all days with a little walk. Might not get right next to it due to building work in centre at mo as contractors take up quite a bit of spaces, but again only 10min from either train station. No idea about the hudds/Donny ones
If you are doing Theory and Hazard, I’m sure they’ll let you do them both one after another, particularly if you finish your theory quicker than the time they give you. ( I’m not telling you to rush though, take your time) They did with my Cat D and with my Cat C - good luck