Your idea may be the best thing to do.
Another option (costs $50 bucks and uses a good-looking suede 'direct fit' cover). Steps 1) -- [*another website recommended: fill in the cracks with silicone from a caulking gun... use a putty knife to feather edges ... let dry 3 hours...].
Step 2) then glue (use slow drying/strong epoxy-glue - allows you to reposition cover; aerosol spray would help give you fast
and even coverage) this cool suede cover on your dash.
What do you think would work ?
Post some pics if you get a chance [to help the other campers].http://www.autopartswarehouse.com/sku/C ... CH035.html