If you never plan to haul more 'toys' than what you have now, stay with what you have.
I'm a family of 4, but the only one that rides currently. We have plenty of room for kids bicycles or whatever in the trailer. I have a tonneau as a secure place for my generator.
When 3 friends and I go to Moab, we can get 3 dirt bikes in the trailer, and the 4th goes in the truck along with the coolers and fuel and misc. When there was just two of us, bikes in the truck and took my friend's tent trailer.
If I was strictly a dirt bike guy a travel trailer would be good, but it is easier to load my cruiser in the trailer vs truck. Also, we borrowed a couple 4 wheelers to take to the dunes for a weekend; both in the trailer instead of monkeying around trying to fit a Rancher and Raptor in the bed.
I used to use my trailer as a home away from home when I traveled for work. It was nice to use the TH as a garage during the week for the bike.
Each have benefits... When we purchased, I didn't have a trailer at all. $15k is expensive for convenience.
2005 2500 Cummins/48RE/3.73, QCLB, 4wd, BigHorn, Edge Juice w/ CTS + Turbo Timer,Transgo Shift Kit ISSPro Oil and LP pressure gauges, GDP 20/2 filters, Custom Diesel Steering Box Brace
'10 Forest River Shockwave Toy Hauler 21'
Honda EU3000I Genny