Welcome to the site, read some of the beginning posts on this site they are very helpful, also make sure you have passports and documentation in order to obtain your visas and also the documents for what ever vehicle you intend to bring in.
The vehicle import papers are TIP (Temporary Importation Papers) and the tourist visas, the RV will get a 10 year import permit and all other vehicles will get a 180 day permit, not 6 months 180 day same as the tourist visas.
When you exit make sure you surrender the visas and the 180 day TIP, that is important, otherwise there are a lot of folks here that will give you a lot more information and advice, welcome to Mexico.
navegator
