Beach Episode

Hey, new to 40k but not super new to painting miniatures. Figured for my army I'd send our boys to the beach.

I've done a lot of bases before and have some skulpting from scratch experiance but I'm not confident in significantly modifying the actual existing minis. This would be more like storming the beach and ruining the day of leisure for everyone else. Wondering if yall have any good ideas for things to add to the bases to tell a funny story. Things like Dreadnaughts kicking beach balls or a beach chair and a mini umbrella on my land raider. Thanks in advanced!