Post-op basal changes

Just wondering if anyone has any tips for basal rate changes/blood testing post-op?

I'm going for major knee surgery and they are going to take me off my pump for 2 days to use Lantus (I was on it before the pump, but much prefer my pump). I have a feeling that my bloodsugars are going to be all over the place, so was hoping some of you guys might have had some experience, and maybe some suggestions for what I can do, either while on the Lantus, or once I switch back to my pump?