I will be facing a similar dilemma in the next few years. I plan to keep my home defense and CC pistols in a small, unassuming safe we have mounted in the bedroom when we show the house. The gun cabinet with the rest of the guns will get uninstalled and either put into a local storage unit or stored at the in-law's house.
Here are a couple of thoughts:
1) One of the local gun shops in the area offers firearm storage. This might be worth investigating in your area in NJ, or WV. Even if there is no official policy, if you have a shop you know and trust, it could be worth asking the owner. You could also talk to FFLs as they tend to have safes. It would be good if you had a definite back end as your stuff would be occupying space in a safe.
2) Climate controlled, secure indoor storage. I would feel less secure doing this than leaving my guns at the in-law's, but I bet that climate controlled storage would be more secure. You could put all your stuff in there, safes, guns, reloading bench, supplies, etc. Trouble is that people will see you moving your stuff into the storage unit, making it a target.
3) Just leave everything in your house, well organized and locked up. Load up as much ammo as you have supplies for, and pack the rest of your reloading gear into boxes for the move. Store expensive pieces in your safes. You have home owner's insurance... if someone scopes your place out and uses and robs you, at least you are insured. Plus, you might find a buyer who is a gun owner, and is interested in buying your safes with your home, alleviating the cost and hassle of moving them.