hi
Dynamic map configuration should be done in the main site where you have the static ip address configured.
so that the site can accpet the ipsec connection from any dynamic assigned sites.
At your remote location since you know the statc ip of the peer with which you are going to have the ipsec connectivity you can mention the same in the ipsec policies.
Also do take care of the encryption strength and the interesting traffic you mention up for encyrption on both the sides..
regds