Re: Aikido Randori
To make a gross over-generalisation, I would say that 'yes', you will have the opportunity to work up a sweat and participate in randori. It may not be straight away, but your Judo ability will probably help speed things up there.
But that will all depend on the individual dojo, as Janet has stated.
Is there more than one dojo in the area? As a judoka, you may appreciate a dojo that trains in Tomiki Aikido.