Three of my uni friends and i are travelling to Thailand and Australia at the end of this year for a period of 6 months. The Thailand part of the trip allows us 6 weeks from when we arrive to when we depart. We're looking to do a few days in Vang Vieng for the tubing and Hanoi for some more sightseeing, as it's more places to see but also allows us to obtain 30 and 15 day stamps rather than getting a visa.
I understand that once arriving on a 15/30 day stamp we then must apply for an extension before we cross the border to Laos and then Vietnam. Obviously we have to cross through an immigration point, but i'm curious as to how previous travellers have reached Vang Vieng by land or air, and who made use of the Visa exemptions.