Wall shelf for VPI Super Scoutmaster?

Another idea to go with is similar to @mijostyn has proposed. 
This is a different bracket system along the same lines.

https://www.amazon.com/CUZURLUV-Shelf-Bracket-Max-Load/dp/B07VN219GV/ref=sr_1_7?dchild=1&gclid=C...

I'll note that you MUST hit the studs (16"oc) with each bracket. I would use nothing less than (3) #12 screws 2 1/2" long.  1/4" lag bolts are even better. Two may be enough if you use 3" rather than 2 1/2. You can use your own shelving and allow it to hang over equidistant on each side. You might try a maple cutting board for the shelf. If you need further assistance just email me

The shelf needs to reasonably accommodate the footers of the deck (not the outside dimensions).

DeKay

+1 artemus_5
Also, be sure to get your fastener in the center of the stud. You don't want the fastener at or near the edge of the stud and splitting it.

The reason I suggest shelves with long standards is that the load is distributed over 12 screws total instead of 4. The brackets are also easier to hide. You also have a selection of heights.  However, the brackets artemus suggests will work but I would use very heavy duty screws, 3" #16 Torx wood screws or 1/4" lag bolts.
I like the idea of a butcher block shelve. You can order that in various sizes and thicknesses. 

Point taken @ mijostyn. The high value of the TT and its 90 lb weight direct my choice. The ones I suggest fasten directly to the wall. The longer standards you offer have more adjustment and more bolts to hold it. But they also extend the load out from the wall. The standards fasten directly but the shelf hangs from the standard itself making a lever that pulls down & out whereas, my choice puts the majority of the weight pushing down. I’d say that either would work. But I’m a belt & suspenders kinda guy

@markpao 

Also, be sure to get your fastener in the center of the stud.

Agreed 100%