The way I look at it is this . . .
How many toolboxes do we need?
I keep the trailer-specific tools in the trailer . . . and I throw my regular toolboxes in the back of my truck (I have a topper on it) when we travel with the trailer!
Whey would I need a special toolbox for the trailer?
I'd rather spend that money on new tires to replace the BlowMax tires that Heartland just loves to give us, than to equip a new toolbox with a bunch of tools I already own!
Gee . . . my toolbox's are already in the garage . . . not a big deal to toss them in the bed of my Dodge Ram!
Takes about 15 seconds . . .
That being said . . . I have four toolboxes . . .
One is regular tools . . . screwdrivers . . . pliers . . . vise-grips . . . open-ended wrenches . . . that kind of stuff!
Then I have my electrical toolbox . . . with wire strippers . . . coax crimping tools . . . soldering iron . . . wire nuts . . . that kind of stuff.
Then . . . I have my power tool bag . . . which has an 18-volt rechargable drill . . . sawsall . . . circular saw . . . and battery charger and extra batteries (all of these run off of the same rechargable batteries - I have two batteries).
Then . . . I have my plumbing toolbox . . .
Ironically . . . my entire subdivision was built with the same plastic plumbing that RV's use . . . so let me just say this . . . I am a master plumber with the plastic plumbing system!
Matter of fact . . . about a half an hour ago I just finished fixing a leak under our upstairs bathroom sink!
Doh!