I believe me and willem are in agreement over the aim. Cut down what you take in weight and volume and you'll have a better and cheaper trip. We just disagree on some of the details in between.
The chairkits are certainly additional weight that you may feel is an unneccesary luxury, only you can decide that. Orikaso plates and bowls are unparalelled in weight and volume savings, are nigh on indestructible and exceptionally easy to clean. I think your budget should decide that one.
Tents, the trip you're planning and I suspect any trips in future will not be in need of a Hilleberg tent, nevertheless the Hilleberg tent would offer peace of mind in that it will cope with nearly anything. Vango, Vaude, MSR, Exped etc. all do more affordable tents that will provide undiscernable differences in their performance in the conditions you intend to camp in. Again, your budget should help you decide.
Good luck with your planning.