Needing some lift

Glad to be here on this Tacoma forum I just found.
Anyway, I have a 2002 TRD quad cab 4WD Tacoma (had it 10 years) but I need to add some lift to it. I tow a heavy boat and haul quite often so not only does it sag a lot when loaded but also sits low now. Was not only hoping to stiffen the rear and bring it back to normal but lift it an inch or two at least.
Was thinking of adding a leaf and was wondering if this would do it.
My guess is it would just bring it back to like it was new.
Woukd like to add an inch or so up front too. A little rake though would be nice when unloaded.

Thx for ANY help....Ed.