Here’s how we carry our 12 foot porta bote.
I installed a 10 foot aluminum roller table under our toy hauler.
The boat rolls in and out effortlessly.
I created a V shape bracket up front (made of simple 1 inch wide aluminum straps), too hold the boat up front. The boat slides in all the way, till it stops. Without the straps, the boat would keep rolling right off the table.
In the back of the roller table, I created an aluminum panel, that holds the boat in, alone with ratcheting straps.
I had a hitch shop (Spillar Custom Hitch of Austin Texas), custom build the rear support bracket, that’s wielded to the frame. The bracket is made of 3 inch tubular steel, and has 2 heavy duty steal roller wheels attached to help on low entrances. For about 3 years, only two driveways used the roller bars (as far as I know), with no problems at all. The whole assemble is about 1 1/2 inchs below the license plate.
If you look for roller tables, get the aluminum versions. The steel version are too heavy. The table is attached to the bottom of my toy hauler frame using metal brackets I created.
Here’s some pic’s:
Pic of roller table on ground, before installing:
Pics of installed roller table:
A pic before I had the rear bracket welded to frame:
Assembled boat at water dock in a RV park, about 20 feet from our slot: