Re: gvw of a travel star 23srg
You need to get inside the trailer and find the UVW on the label that is usually in the kitchen cabinets. That is the Unit Vehicle Weight or the empty weight as it left the factory.
The GVWR will also be on that label. That it the Gross Vehicle Weight Rating. That is what the trailer is capable of weighing based on the axles and tires.
I don't know what your Kia can tow, but it should be in the owners manual. Don't get too close to that rating. Remember pulling a trailer is only 1/2 the battle, you also have to stop the trailer.
On top of the UVW, you will need to factor the weight of water, LP, food, clothes, chairs, etc. Usually 500lb will cover it except for the water.