If I was using different sized baits like particles, a pellet mix or something to cloud the water I'd spomb it out. Boilies I'd just be catapulting but have to be mindful the spomb spooks fish on some venues. For example I fished a new venue for 48hrs last summer (few acres) and was spombing my bait out n never had anything. After about 24hrs the owner came to see how I was getting on. I'd not caught nothing at this point when he said as soon as they hear the spomb hit the water they disappear off down the other end of the lake. Stopped spombing and recast to a area where and finished the session on 2 fish.
Recasting depends on method I'm using, I also never fish with all my rods on the same spot. I'll cast a method feeder around or small sticks of pva leaving as little bait as possible in that area but if I've baited a area I'll stick it out maybe bring my rig in every 2-3 hrs to add a bit of attractant. I've lost count of how many times I've baited a area n had no luck after a hour or two so I've moved only to see fish showing on the spot I've just moved from.
Plastic baits can work all year round imo especially if your fishing them over same type of particles. Can also soak them in a attractant as they take on flavours pretty well.
If there's no signs of fish I generally go for some overhanging trees as they like to hold up in snaggy areas and whichever part of the lake catches the most sun as long as it's not too shallow.