Probably the most convenient is the Raddison in Kingston,ON. It overlooks the Marina where all the Poker Run boats will be.
The rooms have recently been upgraded and we found it clean and convenient to everything. It is in the downtown core right on the waterfront so you can walk to many restaurants and shopping. There is also a Howard Johnsons,
Holliday Inn and Four Points Sheraton. I do not know the name of the Marina but I think it is Municipally run and you likely can find info on the web. Hope this is some help.
Bob