Well the deer will stay in the corn and use it as food and shelter. Also once beans start to turn colors they will leave them alone until they finish drying out. The other thing you need to remember is that acorns are dropping right now and deer will leave corn to feed on them so if you could find acorns that will help your chances.
The last thing is when its hot like it has been the deer will go nocturnal and you may not see them again until a big cool down. I wouldn't worry to much right now if you aren't seeing deer. Wait until all the crops are out in your area which at this rate will be first week or 2 of november. If after that you aren't seeing deer you may need to take a step back and try to figure out whats going on