Lots of good advise above but we get ducks into our field spreads as well as geese, usually before the geese show up. Use a flag to help attract geese if you do try this on your own and even with just a few decoy separate them into a couple small groups or more depending on how many blocks you have. The same is true with blocks on the water, separate them to look like multiple family groups that have converged on the same spot. Listen to the geese and let them guide you on calling, if they are making a lot of noise then call like crazy and if they are coming but not calling much then back off and call a bit more reserved. Seems like the lessers call so much more than there larger cousins. Lots of flaging with either regardless of which variety, they can see the flag from much further away than they could ever hear a call. I have always had to adjust calls to get them to sound like I wanted so about 30 years ago or so I just started making my own. My duck calls are the old Arkansas style single reed, nice and raspy like a old hen mallard and I prefer the short reed style goose call as they are easier to master than the flute type call. Here are a couple pic's . I am the guy on the right in the first, then a pic of a youth hunt with my nephew and a friend and his son. next are some of my call sets.