I am not SAR, so I wont speak about things I don't know much about but........
A lot of our training is spiced up by doing it in the worst conditions possible. Consider doing some searches at high altitude, at night through bad terain.(like a swamp) And then giving strict timings to add pressure. My first escape and evasion exercise in high altitude was a big eye opener as I was sucking wind a lot harder than normal. I imagine it may have the same effect on anyone doing a search.
I don't know how it works for you but sometimes the Army and SAR have joint exercises where we would be dropped off and then told to walk to a certain point to wait while the SAR teams looked for us. They had real footprints to follow etc and real people to find. In the end, both organizations got something out of it and I personally would volunteer again in a heartbeat if ever the opportunity came up.
Call some of the Reserve units in your area and try to get something going. You may be surprised at what can happen when people take the time to try.
If you ever train in Edmonton let me know. I will be more than happy to get lost in the woods for you guys to find me. All I need is a bottle of scotch, a rifle, and knife and I will be set for at least a week.