I think chong ang nam its the easiest way...there go a bus from ssk bus station but i think only at tuesday and saturday, or crab a taxi its about 1h and cost 800-1000 baht. And you will get 30 days and that you can extend again at immigration in ssk. Immigration officer told me you can do 2 border run in chong ang nam and also 2 at chong chom. I was thinking youre the visa guru here in ssk😜