Helper springs or airbags? Help me decide

I don't want a lift but I want to give myself a more level ride while pulling a trailer up to ~6000 pounds. Main focus is decreasing sag for the few times a year I need to haul a load such as this.

What are the pros and cons of each that you see? I'm looking at either Timbren SES helper springs or Firestone Ride Rite air bags.

 

I had the same debate this past year. For my application I went with Ride Rites. They are fairly simple to install and made a CONSIDERABLE difference while hauling and towing. I think what sets the 2 apart is you can adjust the airbags for any application to get the exact amount of rake or lift needed. I also use a bicycle pump to adjust the bags.

 

MN Tacoma, can you post a pic with your Taco and trailer attached? And what system did you end up going with? Thanks