Hi Deb and Welcome to the Group
If it is a new-to-you Trillium
, I would strongly suggest that you find someone that is knowledgeable about trailers and towing and have them go over your rig and set-up with you before setting out.
So far, not mentioned is knowing how OLD the tires
are, anything over 6 years old should be replaced, all tires
have a birthdate code on them. You also want to know about how long it has been since the wheel bearings were cleaned and repacked. Unless there is documentation of less than a year ago, it's something else you need to do before hitting the road as well.
And, BTW: what are you towing with and do you need to have trailer brakes