I find it no big deal to pack it out. It goes into a ziploc bag along with wet wipes and any other associated trash, and I put that inside a second ziploc or thick plastic bag.

Never had a problem with odors, leakage, or anything else.

Toilet paper can last a long time in some environments, and also if it's dumped into the snow, where it plops out at some point in the spring in a big mess. I really don't see the problem with packing it out, and it sure makes things nicer for future visitors.