What is the current process for applying for a Thai visa in Phnom Penh or Vientiane with a clean passport?

Reading the comments here, it seems that Phnom Pehn is a pain even with a clean passport. Does anyone have recent experience of applying via lucky lucky motorcycles with a clean passport (to avoid having to provide flights and speed up the process from 4 to 3 days)? Failing that, any recent updates on Vientiane process? I'm not planning to go till the end of June but like to get my ducks in a row and plan ahead, especially given the new Vientiane appointments that are required. Thanks in advance.