Hi Billydean,
Welcome to the Heartland Owners Forum and Family. We have a great bunch of people here with lots of information and all willing to share their knowledge when needed.
Don't do covers myself, I live in the South where we use the RV at any time. As far as the tongue stabilizer (pin stabilizer for 5th wheel?) I had one and it did not do the job at all. I would suggest the arms or bars between the jack legs like Steady Fast units or there are others out there also.
Enjoy the forum.
Jim M