Early season is about food. Hot or not deer need to eat. Look for/find a preferred food source. Look at the sign there, tracks/rubs. Find the travel route from that sign. Now you can find a spot to set up far enough off the food source not to disturb the deer feeding there and wait in the am. Even better if you can find the bedding and set up off it in the am, go in before sunup. Pm hunts you want to get close to bedding on the travel route. If you cannot find the bedding then set up as far away from the food source as possible on the known travel route. Think 'destination' spot that is 'revisited' often. Food sources and bedding are destination spots, the amount of sign tells you if it is used a lot or a little.
Rubs should be started by now and will increase, 3-4 finger width tracks are generally buck tracks. Bucks bed alone or in small groups with the beds fairly close together and in a rough circle. Doe usually bed in groups with the beds a little farther apart and in an oval pattern. Droppings, hair in the beds, and the amount of tracks will show you how much that spot is used for bedding. Also buck beds will have rubs close by.
By finding the destination and then the route you will be able to set up where the deer are most of the time and distance the set up from the destination to increase your chance of seeing the deer in shooting hours without disturbing them. If they are leaving bedding late then you need to be close to bedding in the pm. Everything really revolves around bedding but food source destinations are also a viable option.
Any scrape found early is generally a good place to hunt but its location in relation to bedding/food source will help you determine when to best hunt it, also rubs tell you direction of travel. If a rub is on the side of a tree that faces the food source then the rub is made after the deer leaves the food source.
Lone or small groups of oaks are better if they have sign that shows they are being revisited because it is a smaller destination than a large area with a lot of oaks......
Keep at it, keep your eyes open and think about things, avoid setting up in some random location along a trail or a random spot in the woods. Obviously you need to consider the wind and thermal flow in relation to where you think the deer will be moving and your position/travel route to and from your set. If hunting mobile while you scout avoid 'backing up' and then setting up, that will allow deer to scent your residual scent that you left before they reach you.
Obviously, water sources are something to think about but will produce more opportunities if they are in limited supply and you find one that is being revisited regularly. A water source close to bedding may be good for afternoon/midday.
Happy Hunting!