You have many options but it really depends on where you are in SSR
1) You could walk - especially if at Congress Park
2) You could take the bus. The DTD bus will take you there.... don't get off at the Marketplace .... wait for the PI stop
3) You can take the boat (check the times). Green flag boats go to DTD and then there is another boat which moves around DTD (red flag??). The boat is a good option only if you staying near the dock (Grandstand, The Springs)
4) You can drive... takes only a couple of minutes. The parking can be busy but not too crazy.