I would be proactive in contacting them about coming for thier equipment, giving them a reasonable amount of time to claim it given their location. If they were out of state, I'd give them a few months, maybe even til Fall hunting if they were leasing another location near your former land. But in the end, if they're taking their sweet time to get their property, they must not care that much about it and you're not their free storage center. So I would check on what's legally allowed and if so, I would sell the stands for scrap and send them a check for the amount you got for them. That's more than fair in my mind.