Weddingbee boards

We plan to get married in a private beach ceremony 1 week before our official "wedding date."  When we return we will have a more traditional church wedding in either a beautiful old indoor stone chapel or outdoors. 

Either way, because we will already be "married," we will have a few traditional elements like my dad walking me down the aisle and attendants, but I want it to be casual with time for our grandmothers to say a few words, etc.  We originally planned for the ceremony to start at 3:30 cst, with the reception to begin immediately after (the two locations are only minutes apart).     

Well, I went to the reception site on Saturday and noticed that they have an outdoor stone altar maybe 100 ft from where our tent reception will be held.  It is just a stone altar with a cross behind it and a few rows of stones that would seat children and teens comfortably.  The coordinator told us that white chairs can be placed around the altar. 

Now I think it might fit a little better to go with the stone altar and to have our reception first at 4:30 cst, with a sunset informal ceremony at the stone altar.  What do you think?  Is it too awkward to have the reception first?  Has anyone planned something like this or attended one?  If we go with the reception first, does it make sense to ONLY use the indoor chapel?    

Oh, and the price is essentially the same (the indoor chapel is $200 and chair rental will be the same).