Congrats on the new rig!! One of my neighbors at the Kansas Speedway race has your trailer and I must say its very nice and they have been very happy with it.
As far as suggestions...pay very close attention to the walk through. Ask questions and get clarifications on everything. Reguardless of weather, operate everything mutiple times. Check everything. If there are any issues its easier having them correct it before you take ownership.
If possible spend a night or two at site getting fimilar with the unit and re-checking everything. The most important thing is to have fun.
Welcome to the forum!!!