We took our TV & TT to the CAT scale just down the highway last year. I thought I was well within my limits and the weighing verified it. That's one less thing that I have to spend time worrying about.
The procedure (for me) was 3 passes over the scale. The guy said I had to drive off and back on between weighings. So went over with the TT and WD bars set up. Pulled off, disconnected the bars and made another pass. Third pass I unhooked and just drove the TV over.
The weight pads were sized right for our combination (we have dual axles on the TT). I didn't think to do a side-side weighing and don't think I could have as there was a barrier on both sides of the scales. Different scale layout, maybe you could. Make a pass from both directions with one side on the scale at a time.
Overdoing? Dunno, I haven't worried about it but I recall seeing posts where folks have measured all 4 wheels of the TT to insure ballance.
Cost? It doesn't matter. But I know you want the real answer: 1st pass was $9.50 and the last two were $1.00 each.
I stopped at the cashier first to tell him I was weighing a travel trailer and would make 3 passes. I guess he doesn't see too many TT'ers weighing because while making up my weigh tickets he asked what my cargo was.
"Two people, a dachshund and some beer", I tell him.
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Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks