Once I got over my nervousness about hitting the scales, it's gotten a lot easier to "buck up and do it".
Heck, now I have more nervousness about parking my camper among the trucks than I do the actual weightings.
But, yes- the folks at the scale house aren't going to be any help. You have to have a plan for what weights that you want to get. Like Dave said, for a travel trailer there are 3:
1) truck + camper hooked up w/ WDH engaged
2) truck + camper w/o WDH hooked up
(go park camper in a truck spot)
3) truck only
In each weighing, you want the truck to be on different scale platforms + for the first 2 weightings, the trailer to be on the third. The platforms are laid out that you almost have to do it that way.
(Note, for the fifth wheelers that may read this- fifth wheels only need 2 weightings 1) truck + camper and 2) truck-only.)