Is this too much trailing arm rust?

[GranPrix]

I bought a 95 grand prix sedan as my winter car. I was poking around with a screwdriver when I poked through my rear trailing arm where it mounts into the U body. Everywhere else on the mount seems solid. Its just below that little oval where it is rusty. Is this too dangerous to drive on for a winter before I get it fixed in the spring?

[94 olds vert]

I've seen worse than that. I would just spray it with fluid film and move on that will slow the rust down. I've seen these fail and usually they have way more rust than that. 

[GranPrix]

Thanks

[GranPrix]

There was a mouse nest inside the mount. I removed the nest and fluid filmed it. Hopefully it lasts me the winter