Wedding photos (size Editing)

wedding album and Photos on disc for the customer...
Does one keep the photos at the camera size..
Portrait 2:3 ratio
Landscape 3:2 ratio

Or does one change/crop to another ratio or letter size or something else?

Well, to me the answer would be "It depends"...

If your customer is comfortable with doing some cropping to fit a certain print size, then leaving the images in their "native" aspect ratio can work, so that if the customer wants, say, an 8x10 print (4:5 aspect ratio) then the customer can crop away...

But, making that assumption about the skills and the comfort "zone" of a customer can be, well, "iffy". You may be better off making a "judgement call" about a given image and whether a change to the aspect ratio would best suit the composition!

Always 3:2 unless you have a very special reason for otherwise. For example I took one photo at my last wedding knowing I had to crop something out and make it more like 16:9.

Never through away part of the image without good reason. If people want a 5x7" print they can come back to you or do it at a kiosk.