Afternoon all.....
Can't say I'm too familiar with the Leeds area really but there are plenty of places for you to try in the more general region of Yorkshire.
One thing I would say though is not to limit your fishing just to venues where you can use a boat, you're not really doing yourself or your fishing any long-term favours!
Have you tried the following venues?
Selby Three Lakes (No boats)
Sally Walshes Dam, Hemsworth (No boats)
Newhay Carp Fishery, North Yorks (boats allowed)
Raker Lakes, Elvington, North Yorks (No boats)
Elvington Lakes, Near York (No boats, days only)
Nostell Priory, Wakefield (Days only, boats allowed, Wakefield club book)
Emmotland, North Frodingham (boats?)
Hull & District A A, East Yorks (boats allowed on all waters):
Motorway, Brickyard (days only)
Brandesburton No. 2, Brandesburton No. 3&4, Windmill Pond (class B ticket required for nights)
Those should keep you going for a while!
Monster