My wife and I both got flagged for being on a prescription at the time - Lipitor (I was only on it for three months - not on it any more) so we needed to spend about two minutes with the doctor for him to determine that we were both fine to dive. As stated above, they ask the standard PADI questions, and anything that is checked will get you a visit with the doctor, as to be expected. No physical was required.

Yes, the zodiacs have flip-down ladders on the back, water entry (backroll) and boat entry (ladder) are both easy, you should not have any problems.

Cheers,
Ken