if your just looking to water you plants there is no reason you couldnt use the swamp to your advantage you could use a wick system with ropes ran into the swamp but would try to use something heavier than yarn would also suggest you go with atleast 5 gallon buckets if your using a pot then just suspend the pot above the water by placing on a stump or tree or make a floating raft to place it on so it can rise and fall with the water level
if the water level doesnt rise and fall much and stays near the same level at all times you could also mound up the soil in the swamp to where there is a decent size mound of soil above the water line and not use pots at all and just plant directly in the mound above the water but if the water rises to much your plants will likely die if using a mound.