if you are crossing on foot and don't have a good reason (dr visit), they might make you buy a 6 month tourist visa pass for $30.00. But it is good for multiple entry for 6 months. .... By car, no problems entering
Yes, on foot there's a small possibility they'll question the reason of your visit. It's supposed to be only for doctor visits, so they might hassle you. Driving, there's no problem
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