Camelot

It's very gimmicky in general with many of the boss fights having special abilities and such you need to compensate for making Camelot overall a big step up in difficulty. That being said it's not harder then something like nerofest exhibition matches so if you did fine there your probably alright.
On a side note Camelot second arrow of the first node also claimed a handful of retries when I originallly went through it so take that with a grain of salt :P

Camelot tis a silly place :)

Best servant recommendation for Camelot :
- Euryale known as Destroyer of Camelot and the meme itself, Legendary with massive damage against male. Note Camelot enemy mostly male.
Art type Archer come with high chance charm against male, NP gauge taker, NP with charm against male. Also with 3 turn art streroid.

- Georgios, Leonidas, Mashu, D'eon will make a safe journey in Camelot. Function well for blind run usage, Boss taunter, and much more. Mashu and Georgios more recommended. Though it's up to your team.

- Any decent leveled saber, because Camelot contain heavy knight class. Prepare AOE and ST saber. Thrust me no saber in FGO below Silver rarity.

- Lancer like Chu and Proto Chu can save your team in dire situation regardless the situation.
Heavy knight class with High hp, like i mentioned above.
You can also bring any other decent leveled lancer there.

- Strong ST rider like Georgios, Yoshitsune, Kintoki or leveled ST rider will do the job.

- David mostly have a big role in Camelot like Euryale, Strong ST archer with Def up, Atk up and Strong NP will make your work easier. Team wide evade for taking NP damage from bosses.

- ST Caster like Medea can help you taking down some huge hp Assassin there.

- Any decent leveled berserker, they can do big job when you don't have any mentioned servant before. Spartacus and Eric can one shot big wave enemy there.

- Supp like Hans, Mozart, Shakespeare, Helena and Marie cas will give you a lot of benefit in Camelot.

Also so much other Great servant like Billy, Robin, Hector, Paracelsus and much more for clearing Camelot.

Expensive one :

- Gilgamesh, well he is Gilgamesh after all.
- Raikou pretty similiar like Gil.
- Jalter high neutral damage with strong steroid.
- Ozy, have you seen a Fortress that can shot some Beam. Well that is him.
- Jack the ripper pretty much can kill some rider there.
- Sanzang or Ilya, strong ST NP caster for a lot of ghost mooks.
- Orion kit similiar to Euryale, with more Durability.
- Waver yeah he's a monster stronger than mentioned 5 star above.
Other 5 star also viable, well they're 5 star in the first place.

I'm not listing more 4 or 5 star because, Camelot is not that hard as long as you know how to deal with it.