Damn right! Btw, for anyone and everyone thinking of riding in Vietnam, definitely do check Tom's vietnamcoracle.com Amazing site with a wealth of info on different routes in Vietnam. Another resource is FB group vietnam backroads. Generally, you can enter both Laos and Cambodia with Viet plates. However, some border crossings are a no-no, people didn't manage to enter those two countries at minor, more local crossings. But at places like Moc Bai near Saigon, and similar major crossings it shouldn't be a problem. There is more about it online... As far as I know, foreign bikes ie. EU,USA etc. are not allowed just like that. You cannot just show up at the border and get in. Me thinks it's same as China, Myanmar, Thailand..permits and stuff. Or in other words, tourist tax.