I'm glad you asked, but there are some major questions that will need to be answered before you can move forward.
Whats your budget?
Will your vehicle tow it?
Going to Island 22 can be tricky for the uninitiated, more so for those with propeller driven boats. River boats in the Fraser Valley and typically purpose built with jet drives and flat(ter) bottoms than those for salt water use. Flat bottom boats are the most stable and fastest hull design but right like a gravel truck in wind chop and waves. They are not ideal for saltwater. Salt water boats typically have 12 degrees of deadrise (Vee) to cut through waves and provide a smother ride in the rougher water. They're also usually propeller driven, which is not ideal for shallow river channels as the overall draft of the boat is much deeper than flat bottom jet boats.
You'll have to start doing you homework, but it ALL depends on what you can pay. Once you have a number, there will be plenty more to discuss.
Cheers!