Most basic introduction for a newbie group

[Anonymouse]

I am thinking of using MyRouteApp to lead a road trip with members of a classic car club - many of whom are non-technical and have never tried anything other than Google Maps.

May I check a few things so i can bullet-proof this please:

1. Once I've built the route in MRA and made it shareable for the group, I think they will each need a subscription to MRA Navigation next, but for this purpose do not need a subscription to MRA Route Planner. Correct?

2. For MRA Navigation Next they can buy a subscription for one month, or use a 14-day trial. Or is there a referral code I should be offering?

3. While I see there is functionality for Groups and Events, I don't think I need to use this for a plain one-off event (it would be simpler to just send them a sharing link rather than try to manage a list of logins/emails for all the users). Correct?

4. I see there is an Invite Friends option but does that do anything other than email them a link to the MRA main page?

5. Once they have the navigation app is there a very basic, very bulletproof introductory video and/or walkthrough that I should direct them to?

Thanks.