1) I've never had much trouble catching SOMETHING from Hagg, and I'm 100% bank bound. You have a kayak, so you already have a big leg up on me! (translation: you'll be fine dude)
2) I doubt there's actually THAT much variation in how people are fishing the lake at any given time. For trout: powerbait or worms off the bottom or trolling (usually some kind of wedding ring, probably doesn't really even matter - when the bite is on, it's on). For bass: mostly soft plastics (stick to this at first), though I've caught them on crankbaits and spoons/spinners as well. Point is, those are some of the mainstays, and most variation is probably due to past posts on here being posted at different times of year and at different points in the stocking schedule!
3) Don't wait until noon to go fishing. I know I know, you can fish deeper later in the day, and some days it doesn't matter. But I can't count how many mornings I've fished Hagg and the bite dropped off around 10-12...it's a constant source of amusement to me when people show up in the middle of the day scratching their heads at why the fish aren't active!
4) Lastly, if God suddenly granted me a kayak today (wouldn't that be cool!), I would cruise the coves on the north/northeast side of the lake (f*** Sain Creek, too many people, not enough cover) pitching plastics at (pre)spawn bass, they're everywhere. Youtube how to fish the different rigs if you don't know. I would also have a rod rigged with some nymphs to pitch to trout in the same areas, there are definitely schools of trout cruising the shallows this time of year. While this is just what I would do, it doesn't really matter, my description still tells you where there are likely to be fish and how they're thinking this time of year!