1. I have the Lucid NACS to CCS1 adapter for DC fast charging like at Electrify America (EA), EVgo, etc. I procured this through the Lucid store (and even got to use referral code points). I ALSO have a NACS to J1772 adapter for AC charging (slow charging, Tesla destination, Level 2 charging, etc.). I purchased this directly through A2Z. This is what I have used at hotels that only have a NACS / Tesla-style connector.
2. Yes, you definitely need both connectors. I have not yet used my NACS to CCS1 DC adapter. That one is currently limited to 50 kWh at Superchargers (still about 4-5 x faster than slow charging and about 1/2 the rate as DC fast charging (typically is perhaps a bit over 200 kWh falling to 100 kWh at ~50% charge). The rare Tesla Magic doc chargers allowed for CCS1 charging without an adapter (my understanding) - and some Tesla destination chargers have both NACS and J1772 built in. There should be a roll out by Tesla that will eventually allow higher voltage and greater delivery beyond the 50 kWh for Lucid and other vehicles..
4. I purchased the fast DC adapter from Lucid. There was some comfort knowing that Lucid was behind the product. My understanding is the lectron and A2V are reputable - but you will need both types.
5. I preplan my road trips using the web sites from the suppliers (like EA or EVgo) but also have PlugShare and would be prepared to download the Tesla app or at least find a supercharger station. My trip from Chicago to Cincy can be done with 15% remaining (driving true highway speeds in warm weather or slowing it down in the colder weather) but I like to have more charge and will usually have a stop. There is EA in Lafayette and Indianapolis (and outside of Cincy) and EVgo in Remington and Shelbyville. It doesn't take long to familiarize yourself with the charger supplier apps as well as PlugShare and ABRP as well as the Lucid on-board navigation. The Lucid on-board navigation, I found a bit clunky until I learned the addresses of the DC fast charger locations that I was interested in. Then I can navigate to them using the on-board navigation knowing the preconditioning will be automatic. Otherwise, when I know which charger I will head too, I try to start preconditioning at least 20 minutes prior.
6. I've only had my Lucid for the last year and I would say that I've found my favorite EA locations more reliable recently compared with a year ago. There is a small learning curve at each location. As my "free" charging just expired, I did make use of EVgo on my last trip. For EVgo, when you sign up, they occasionally send you $5 or $10 credits which go a long way if you are trying just to top off 10-20% state of charge (SoC). I'm also selecting hotels that allow me to charge to 100% overnight for a return trip. I'm waiting for a Lucid / EA deal where hopefully, they give Lucid owners the same pricing as someone who purchases an EA subscription plan.
Hopefully this helps. It is such a joy to road trip in my Lucid especially with the hands-free (but still paying attention) DreamDrive Pro. All the little muscles usually engaged with driving just do not have to be on long stretches with DDPro - it is surprisingly much more relaxing. Others should clarify if I mis-spoke or if they have other opinions.