How do I get to these places from Bandar Seri Begawan?

That depends on the specific route and real transport links available — check train/bus options directly, or a private tour that includes transport (see the listings above where available).

Can I do these as a guided tour instead of independently?

Some nearby cities have real guided day-tour options departing from Bandar Seri Begawan — check each city's own activities listings above for current availability.