My older basscat doesn't have a tray or anything to keep my boxes in place. Anyone have any suggestions?

Crate from The Container Store. Or, just put enough of them in your storage compartment to keep them on end.

Bump. Any other thoughts?

I just put the ten or so boxes in the boat and go fishing... doesn't take long to figure out what I'll mainly be using for the trip... but if you really need something to store the storage boxes in you can make something pretty easily.

Bass Pro sells a really simple square bag with handles on the sides . I think they are around $10 . I use them to set up what I store in my garage , one for plastics , one for reaction baits etc...
When I plan a trip to a particular lake , I have one or two of these bags set up with what I plan on using . simple to prearrange , put in my boat , take out , organize.
Each bag holds 12 3700 boxes , standing them vertically , I label the end of each 3700 with whats inside.
Really quick to find exactly what I need and easy to take all out when I get back home

Looks like that mainly holds 3600's

I have 2 of their large fiber trays in my bass cat. I put 5 3750s and 2 3600 in each. 3750s are the same size as a 3700.

Their description is off.

go to somewhere like staples of office max and get a file folder organizer. i have used these for a while in my boat as well as tackle storage organization in my office. work great and pretty budget friendly too.

Walmart has these office organizers. One will hold 3 3700-boxes upright and they can be linked together.

Ill go check my Walmart tomorrow. Thanks!

I took a 3600 and a 3700 to the Container Store and walked around till I found exactly what I needed. They have all kinds of configurations. Worked great for my older Ranger.

good idea ^^^^^

File folder racks from Wallyworld. I had two of them pop riveted together for years in my Nitro, worked like a dream.

This.
Just put enough boxes in there to where they keep each other upright.