Can we leave a rv there year round? We will be staying there during winter months and going back north without rv for summer

No, you wouldn't be able to just leave your RV on base. Are storage lot is currently full and we don't allow temporary storage at this time.

I doubt it. Many places on bases don't. Just call them to find out.

I don't know you would have to call the base. I am one of the ones adding new site with water and sewer hook ups