Our first AS was a single axle 63 SAFARI.
With the single axle I would push at least 15% more weight to the front.
Most important...you do NOT want a heavy butt.
Port & starboard is also more important with the single, keep notes on what stuff weighs and move everything around on paper first.
Your hitch & lash-up options are more important with the Safari also.
You will benefit greatly by an appropriate WD hitch with sway control.
30yrs ago a Reese straight line with two friction frame mount anti-sway bars worked for us.
Today's users are touting the 350 Blue Ox...do do due diligence.