WOw,Im surprised you can cultivate mushie beds here in the Phx. FUnGii Perfecti was advising only blue oysters as an indoor cultivator due to climate. Is ur water bill $$? I gave up non-native edible gardening due to $15000+/mo water billsfor garden alone(now its Native Seeds or foraging).
As for bringing home foray spawn: Im no expert but common sense says you are expecting success while exchanging extreme micro-environments. Even in NAture, the variability of fruiting is dependent on the micro-climate conditions prevalent THAT year independent of previous success at same spot (i.e. cycles of banner years). In other words, you can try but expect an upward climb in exchange for the foraged (free) spawn.