A bullywug lair

[Mandrake]

Hi!

I am running a home-made campaign for 3 players of currently 3rd level (Fighter, Ranger, Wizard). They will be tasked with attacking and slaying a host of bullywugs. The host includes (fighting members only):

Pharblex Spattergoo (CR 3), 3 Bullywug skirmishers, 7 Bullywugs, 4 Giant Frogs

They cannot face them all at once and that is not intended. What I need are some cool ideas and advice about designing the Bullywug lair and making it an interesting experience.

So, forum, what would you add to a Bullywug lair, and how would you imagine it or like it?

Thanks!

[Unoriginal]

Bullywug leaders like to appears as grand and glorious as possible, and desperately try to impress all those who visit them.

They would want a "palace", either a big wooden hall-type building, or a repurposed ruin or abandoned building patched up as they could. Other bullywugs would probably live in sturdy tents or smaller wooden houses, organized with the most important members being the closest of the "palace".