Suspension help with increased weight for camping?

I currently have Icon RXT Stage 3 leafs + Bilstein 5160 and 6112 installed on my 2023 Tacoma OR. I got this kit installed after I put a GFC camper on it. I now added a Decked drawer which adds another 200lbs to it. I've noticed a bit more sluggishness in handling and I'm concerned that it'll be way worse when fully loaded. So I'm considering adding either SumoSprings, bump stops or Airbags and wanted to ask the community what the best option would be for this use case.

 

Sumo Springs and airbags are more for sag than handling performance.
New shackle hangers might be the ticket if you are looking to stiffen up the rear end handling.

https://www.tacomaworld.com/threads...rage-2005-2023-tacoma-shackle-hangers.519625/

 

Are those icon leafs designed for flex or load?

Do they even have an overload leaf?

Also what is the GFC weight?

 

I'm fine with the handling being the way it is. I just want to be on the safe side with sag and that handling just doesn't get significantly worse.

GFC weights 275lbs. The Icon RXTs come with an overload leaf which I left on

 

Rear leaf pack rated for a constant
400-500lbs or add airbags to the truck to help with sag. Add a rear swaybar to help with handling with addl weight in the back.