I have a soft storage container in the trunk when going on trips. I just throw in my small bag with the Viair P88 pump, patch kit, some pliers and screw drivers and a few different wrenches and sockets. I also carry a Lithium jumpstart kit instead of cable that can jump a few cars in one charge (I also have cable for really long trip but that's mostly with the Odyssey). Then I have another bag with tow strap, D-rings etc...when I'm heading to snow or potentially offroad. Everything is in a couple of bags I got from Harbor Freight.
I still need to find a way to mount the MaxTrax on the roof.

 

I don't use my 3rd row really at all so I put some things down in that area in front of stowed 3rd row and behind second row

 

Milk crate in the back with jumper cables and a few other things.

 

Another idea I got off of GXOR was some inexpensive automobile clothes hanger poles that can attach to the second and 3rd row grab handles. Great place to put up light things that can be supported here like fishing poles or something else you can think up. You also have some room in the jack compartment.

 

I got a few of these that I used on the second row to hang stuffs. They are permanently attached to the headrests in the Odyssey LOL

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1312.R1.TR0.TRC2.A0.H0.TRS5&_nkw=head+rest+hanger&_sacat=0



This one is also looks good

 

You can fit a fair amount in the jack compartment. Here is what I have in mine.