Chris, your signature is awesome. Question, do geese/ ducks pass the field from feed to roost? If they do, you have a good bet in killing some birds. It cant be a quick set up though. Make every dek count. Here is a trick to hunting the tarp without shine. Dust it with flat black paint. Don't paint hard, just dust it. Black sand bags will help with the wind. See if you can find the noodle bags. Much easier to carry. Put 5-10 pound'ers all around it. If you do it right, it will look like rippling water. About the law, I cant find anything that says you can't hunt over a plastic pond, there is a lot of don'ts for baiting but nothing about using a plastic pond as bait being illegal. Try calling MDC and see if you talk to an officer. Heres the link.
Let us know what you find out. Good luck bro.