@Lyle
well a 2-3 person backpacking tent is very different from a 2-3 person car camping tent. for 3 people car camping id get at least an 8x8 dome tent. ( dont be afraid to get bigger , its the car camping tent anyways. ) . grab a can of camp dry spray and a thing of seam sealer. set the tent up in the back yard on a sunny day. give it a good spray. ( im sure theres a youtube on it ) and roll the goop seam sealer on the seams