Best way to ensure combinations from the ValidationSet parameter attribute are processed correctly in PowerShell without using multiple IF statements?

I have an advanced function I have been working on that looks something like this:

Function Do-Something
{
[cmdletbinding()] 
    Param  
    (              
         [Parameter(Mandatory=$true, 
         [ValidateSet('Yes', 'No', 'Y', 'N', IgnoreCase = $true)]   
         [string[]]$Param1,
         [Parameter(Mandatory=$true,  
         [ValidateSet('Yes', 'No', 'Y', 'N', IgnoreCase = $true)] 
         [string[]]$Param2,

         [Parameter(Mandatory=$true,   
         [ValidateSet('Yes', 'No', 'Y', 'N', IgnoreCase = $true)] 
         [string[]]$Param3
    )  

 Begin {}

 Process 
 {
   


 }
}

My question is, how do I get the values such as "Yes", "Y", "No", and "N" that's located in the [ValidateSet()] validation attribute processed correctly without having to use multiple "If" and "ElseIf" statements. 

For instance, I want to avoid the following, because I know there is a faster and more efficient way (less typing) to do it:

If ($param1 -match "Yes" -or "Y" -and $param2 -match "Yes" -or "Y" -and $param3 -match "Yes" -or "Y")

{

#Do something here

}

ElseIf  ($param1 -match "No" -or "N" -and $param2 -match "Yes" -or "Y" -and $param3 -match "Yes" -or "Y")

{

#Do something

}

I was reading that splatting may help me here, but I am new to the splatting technique and need some help with this one.

I appreciate any help that anyone can offer. 

Thanks