I would say that if you are to your spot between 7-7:30 you should be fine. Remember depending on the spot you picked you may encounter people showing up at 8:50, parking on the road and just walking in where ever they can just to get in. This has happened numerous times to me on opening weekend and it sucks but I get it, I personally just keep driving if I see someone at a spot I want to hunt. The windom area is extremely busy opening weekend, even though there are tons of public pieces to hunt it seems like any open 100yd spot along the road will be filled with a truck by 9am and you will be hunting a spot with multiple groups. Good Luck!
agree, thats what happened to me last years opener, never flushed a bird first field, but later in the day it seemed to get betterI never have much luck opening morning but that doesn’t stop me from trying. I think most birds are in the corn by 9am. Expect people to drive up at 8:50 and park 100 yards away and sprint ahead of you and cut you off. The afternoons are usually less crowded and the birds are coming out of the corn. I remember an opener in Marshall where a guy was in the process of cutting me off and I shot a rooster that his dog flushed. Lucky for me my dog marked and retrieved it.