Nice work on the marker lights Jonathan. Looking forward how you do your front grill. I picked up one of those kits just to keep. Like you i should have picked up a few....
I stored some kits in an out building for a year. I believe older kits will be fine but the newer kits will warp over time in high heat. I would get tires and decals out. Jonathan has a good point also on the tires and decals.