"Very nasty Elf-Man Elrond" -Sauron, probably

...and thus at the last as two divided hosts the Noldor set forth upon their bitter road. Fëanor and his following were in the van, but the greater host came behind under Fingolfin; and he marched against his wisdom, because Fingon his son so urged him, and because he would not be sundered from his people that were eager to go, nor leave them to the rash counsels of Fëanor.

so I've been thinking about this sentence and I don't think we truly know what Tolkien intended here.

My first instinct would be the Honda Odyssey, probably an early/mid-2000s model. Since Fëanor has 7 sons, the 8-seat Odyssey gives exactly enough room for all of them. You could argue that "his following" implies more people but I think "following" is likely in additional vehicles (ie metonymic use of the word “van”), or else possibly they're using the cargo area efficiently (still kind of a stretch tho imo).

HOWEVER there's a strong case for the Toyota Sienna: similar capacity, reliable, available with AWD (whereas the Odyssey is FWD) which becomes relevant almost immediately. The counterargument is more about Fëanor's psychology than anything else; ie, would Fëanor who "sought the counsel of none that dwelt in Aman, great or small, save only and for a little while of Nerdanel the wise" actually purchase the sensible minivan recommended by Consumer Reports?

Finally I don't think we can dismiss the Chrysler Town & Country. With its luxury trim (leather available), 3-zone climate control depending on model/year, I can imagine the Oath of Fëanor being sworn next to it despite the inevitable electrical faults, moreso than, say, a Kia Sedona.

with perhaps some extended passenger space as well.

This also makes sense because, as this IS Feanor, I know in my bones that the van was not left plain and he WOULD choose something that could be decorated in order to convey the true dignity and glory of his position as High King of the Noldor.

Namely, the van was of course painted by the finest artists of the noldor in scenes of great majesty and splendor.

you’ve not been moving around? FATIGUE!

you’ve been standing? FATIGUE!

you’ve been sitting? FATIGUE!

you are simply conscious? FATIGUE!

you’re sad? FATIGUE!

you’re apathetic? FATIGUE!

SUNDRY SIDNEY is a set of animated armor created by the exiled archwizard Edwina Castor and her apprentice, Auma Liu. When she found herself straying from the simple orders of "stand here and guard the tower," things escalated into her escaping entirely to explore the world where she met

SER BARRY SYX is a knight of the realm-turned bodyguard and member of the elite palace guard battalion. When every other member of his team died foiling an assassination attempt he was reassigned to guard Prince Valdrinor on his wanderings outside the palace. He may, or may not, be harboring an animated set of armor in his living space at the palace.

LADY MARGARET ENCINO is only at the palace to conduct discussions regarding her small duchy's finances. Yes, technically she was invited to the wedding as well, but really it's about trade negotiations and how to get one up on her rival, Lady Lucienne Rex.

GUNTHRIAL MIGGLES-RASHBAX, technically a Lord but you don't have to do all that, just call me Gunnie, has been a ward of the royal family for several years now to pay off an unfortunate debt. He finds Prince Valdrinor to be a pretty cool guy, actually, but spends most of his time working on mechanical inventions for the crown.

On the eve of his wedding, Prince Valdrinor decides that he just can't go through with it and runs away. On the way out of the castle he is caught by his bodyguard, who is reluctant to let him go without protection, and caught again by his friend Gunnie, who is deeply worried about what will happen to him but comes along anyway. Of course, Barry has to stop by his rooms on the way out for his "spare set of armor" and this detour leads to them running into one of the nobility invited for Valdrinor's wedding. Instead of killing her, Barry and Gunnie and Sidney (Barry is your spare set of armor talking?) opt to kidnap bring her along instead, and somehow Margaret Encino finds herself trying to spin the sole heir to the throne skipping out. As they travel down the river, they meet RIVA, some kind of mer... maid? creature?