Looks like the belly areas are taken care of here. Add this to your list of things to do. We use a electric blanket when its cold weather to help reduce the propane use. I use plastic wire staples to tack the blanket connection lead to the bed base frame under the bed overhang. Drape the control over the light fixture and plug into wall outlet. We have separate controls for each side, so we have to connect power on each side. Make sure you unplug the connections when retracting the slide so you don't rip you cords. This has served us well since 2008. I haven't heard of anyone else using electric blankets in the forum? Maybe I missed some postings.
Oh yes, turn the blanket on before you go to bed to warm it up, lol.