ceremony... need help

I have a serrious issues with my ceremony and Im not sure what to do, I need some help.
FH and I are interfaith and all along we planned on getting married at the chapel at cw post. it has special meaning to him as his parents got married there years ago. I was finally able to talk to someone who knew what they were doing and informed me that they are avalible my date and that they can book me BUT the latest they will allow the ceremony to start is it 1:00 because they have a 5:00 mass and need to make sure everything is cleaned up intime. My issue is that my CH doesnt start till 7:00 as of now- if there is no day wedding booked by 4months prioir they will allow me to move up my CH, as of now there is no wedding booked but they can not promise me anything of course. If I can I want to move CH up to 5:00 BUT I think that 1:00 ceremony might still be too much of a gap, what do you girls think? and what if I cant move up my CH? I really had my heart set on having my ceremony outside of the RH but I dont know if this is asking too much of our guests? I also want a gap for pictures because I dont want to feel completely rushed the whole day-which I feel would happen if we have ceremony at RH.
what should I do

how gar off is the chapel for your rh? is travel time a factor?what bout pictures in between?

if there is still too much of a diffrence is there a house in between maybe a family member or friend who could set up a little in between..nothing major just some finger foods and drinks to pass the time in between?

IMO - it's a big time gap but I ask how important it is for you to have everyone show at the ceremony b/c some folks might just go to the reception. . obviously all your really important folks prob won't care but still. . if you are okay with losing a few folks at the ceremony I would go for it if it's the church you want but otherwise I might consider looking for something else. .

Thanks for your ideas...
I feel like I have called just about every other place and they all do outside ceremonies and Nov is to risky for that. I tired all the mansions and havent been able to come up with anything else except CW post and the RH. I am using my own cleregy but the chapel does not want to risk anything, at first they didnt want to do anything later then 12 but I got them down to 1. The chapel and RH are about a half hr apart. My parets dont want to do anything with food inbtween because there will be so much food at the RH Im just not sure what to do! I have been to and in wedding where the couple was rushed and kept getting pulled out for pics because they had no time inbetween ceremony and CH. We are paying a lot of money for the RH and i dont want things to get to hectic and get stressed out. Maybe we can start pictures at like 2 or 3 and then have the ceremony afterwards at the INN?
OR
I can be running late on the day of the wedding and show up to the ceremony at 130 instead of 1.....finish ceremony at 2. byt the time we get out of there 2:30.... CH at 5 (hopefully)??