If they will not bight at all do research or practice off the water. And what I mean if they will not bite is like you have fished for a day or two and only caught like 3 bass!

What i do when they wont bite is i cuss em and make excuses but havent had any luck yet..

Go after bluegill and crappie.

They will always bite for somebody. I can't remember the last tournament I heard of where no one caught a fish. I always think about that Classic on Hartwell where the morning temp was below 10 degrees. People still limited and started out fishing shallow. I don't know how they even felt the rod in their hands.

I  just keep trying things until either something works or I run out of time and go home. This is a time when I try a rig that I've been meaning to try but never got around to like the wacky rig. The night I pulled that out it saved me from a skunk. I caught 5 quickly and got the big one of the night.

 

Beer is often involved. And even when you fail you've learned something.

 

X2, less the beer....

I go to the place on the lake that I know holds fish and slow down, downsize and try to stay patient. This is when I rig up a dropshot.

Drop shot!

Bass aren't biting I'll fish for another species.  I tone down my bass fishing in the warmer months, increase my bass activity in the late fall.

Take pictures of the sunrise/sunset and post to instagram lol. Nah, I would usually try different lures, usually smaller size. Go to different areas, try deeper water. If all else fails.. get out the ultra lite and go for panfish!

I'm a bit late here so maybe you have already visited the lake, but are you sure the big fish that your Grandparents see are bass?