Sanctuary owner Raynor Walker said she needs "more time" to find a new site.
Tries from Raynor and Yeaman ate into Leeds' advantage before Burrow's drop-goal extended their lead to three scores.
Gareth Raynor ensured a grandstand finish when he went over with three minutes to go for his second try.
The home side dominated early on and Gareth Raynor (twice), Sid Domic and Richard Whiting put Hull 18-6 ahead.
For years Amalgamated Bank was closely tied to Bruce Raynor, the pugnacious former president of the Service Employees International Union.
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Raynor linked up with Kirk Yeaman to go over in the corner with three minutes to play but Danny Tickle missed the extras.
"A lot of credit has to go to Steve and his assistant Paul Raynor and the people who work behind the scenes, " he said.
First, from Leon Pryce's scything run, they went close when Raynor's touchdown was ruled out aftre he tried to get on the end of Burrow's chip through.
Raynor's injury leaves Ade Gardner as the only automatic wing choice, so Lee Smith's match-winning play-off display for Leeds will have done his chances no harm at all.
Danny Tickle's try gave Hull hope and after Ashley Gibson's try they hit back through Gareth Raynor, Kirk Yeaman and Mike Burnett to cut the gap to seven.
But that only came after the troubled marriage and bitter divorce of UNITE, the asset-rich garment workers union Raynor controlled, with the faster-growing hotel and gaming industry union HERE.
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Thomas Leuluai tried to shepherd Head's kick into the in-goal area out into touch but Raynor was chasing quickly and got to the ball before Leuluai to score a try.
Essex all-rounder Ravi Bopara will also fly out with Nottinghamshire's Samit Patel, Durham's Liam Plunkett and uncapped quartet Mark Davies (Durham), Robbie Joseph (Kent), Ollie Raynor (Sussex) and Alan Richardson (Middlesex).
Raynor's first try was a simple run-in after an accurate Cooke pass, while his second was a more opportunistic effort after the Leeds defence failed to deal with Shayne McMenemy's kick.
Marc Herbert came close to touching down a grubber kick on his Bulls debut before Royston benefited from great handling by Gareth Raynor and Patrick Ah Van to glide in unchallenged.
Gareth Raynor extended the Bulls' lead, only for tries from Arundel and Rangi Chase to level the scores at 18-18, but Shad Royston crossed a minute before the break to earn the Bulls a half-time lead.
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