Yes there are a few traveler's all the time .
Yes it is huge. U don't need to ask permission. Lots os places to park. As far as overnight parking you need to get ahold of property management. I work at this walMart
Permission to park is extended by individual store managers, based on availability of parking space and local laws. Please contact management in each store to ensure accommodations before parking your RV.
Unfortunately San Marcos Walmart does not allow overnighters.
Parking lots big but you might have a problem with the law enforcement
Yes
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