The three strategies I've seen on tours are the small clamp on dolly's like what was pictured and I imagine are similar to the
roller skate dollies that you are talking about, permanent wheels on the
truss, and a large
flat cart for the
truss.
The small dollies are convenient for rolling over uneven surfaces and cable ramps, can be dealt with by only a single person, and are easily stored while the
truss is in use. Their drawback is that only a few sticks can be transported safely with each set of dollies.
Permanent wheels have many of the same pros with the addition that when the
truss has wheels they can become the wheels that other items can travel on top of. This method was used very extensively by a previous employer of mine that liked to
build their sets out of
truss covered in awkward, heavy, and inconstantly shaped foam pieces. This method also has the added cons that the wheels can be ugly and inconvenient for hanging fixtures around. This is usually fixed by flipping the
truss so the wheels a re up when in use, but you would have to make sure with your
truss manufacturer that the
truss can be used like this.
The last method I've seen is one large
flat cart (usually with a single very strong wall on the shorter dimension to act as a push plate). When built as a 4'x10' cart these can be very heavy when piled high with
truss and require several people or mechanical help to move. On the bright side you can permanently install your ratchet straps to prevent them from walking away during the gig and can easily transport 12 or even 16 sticks on a single rolling
unit making it very space efficient in the
truck pack. This design requires the most planning, they would not be fun or safe to
roll down steep ramps without a
forklift or tractor taking the weight, but it sure does allow you to transport a lot of
truss in one go.