Took a quick look at Radius vs Local Experience.
Local Experience includes breakfast and an into to Munich / Oktoberfest. You then see the parade from multiple locations as you walk to the fair grounds. Followed by a VIP seat (hard to get) in a tent with some beer and food provided. They don't make it clear which tent, which may be importanrt regarding the beer, food and music you prefer. Relatively unique and difficult to reproduce on your own. I show it priced at Euro 220 per person. They also do a regular tour for Euro 190 (similar to Radius).
Radius offer a tour of the fair grounds followed by a reserved seat with beer and food at the Hofbrau tent. Priced at Euro 200 per person. You can reproduce this on you own if you go midweek when the crowds are less. Much harder, if not impossible, to do this on your own on opening day or any weekends.
I suggest contacting Radius and The Local Experence to be clear on what food and drink is included in your tour. Beer is about Euro 15 and food entre Euro 30 (with tips) on average in the tents. If you want the excitement of opening day and the guaranteed VIP seat, it might be worth the money, doubly so if you are already planning on $5-10k or more for this trip.
There are parade stands / seats available, but I don't know how / were to get them.
FYI. Traveling to Oktoberfest and Stuttgart's Volksfest this year with a group of around a half dozen homebrewers from Arkansas.