Hello. I have a trip to Guam in a few weeks. I had a couple fo SWUs that a co-worker gave me so I booked UA through NGO and NRT and took CO down from there (which is EAUable with my NWA PE...).. Anyways. I am asking here for insight on a few things.

I get an ticketed SNA-SFO-NGO (gets in at 2pm) and then (845pm) CO NGO-GUM. I will have bags for this three week trip. I am assuming at NGO I will need to grab the bags, clear customs and then recheck onto CO? Also, I know there is a lounge at NGO will my C ticket let me use the lounge if I don't get upgraded on CO? Also, I can use any RCC (at SNA or SFO) on day of travel as well?

On the way back I get into NRT at 9am and am on the 455pm back to LAX. I assume the luggage shuffle will be the same thing as the NGO situation. How early will UA be open at NRT to check in bags for that flight?

Also, what is narita city like. I hear the train ride is about 250 yen and less than 10 minutes to town. Is it worth a trip to kill the 6-7 hour layover?

Thanks for the help.