Either is a good choice. They just planted trout at Lopez so bank fishing might be more productive there. Margi is full and the crappie bite should be in full swing there. I mean really it is a coin flip. You have a good shot at fish in either lake. With Margi being full there will be more campsites closer to the water. Good luck, would love to get a report. Just a tip, show up with youryak upside down if possible at both and the inspection process is easier. If you can't have it upside down, just make sure you don't have a bunch of dirt and dust on it, and if you open a hatch no standing water.