Personally that's why I don't hunt public land. I would hate to have done my homework, set up a great location, got in pre-dawn and set up sat for 30 minutes to an hour in the dark waiting for shoot time, be smak in the middle of prime hunting times in a great spot only to have some Yahoo come strolling in scouting or otherwise and @#% up my whole morning.
I like to know who's where and I like them to know where I am when I hunt with onthers. All that said, I don't mean to be rude but you should have figured all this out durring the off season. If sunday hunting is still off limits where you hunt, then by all means, go out on a sunday and get your work done when when you won't have any chance of interfering with someone else.
Just my $.02 and I do not mean to offend you. Just sayin'...how would you feel about it if you were the other guy? Good luck either way.