I had a C-350 before getting my 310, and THAT boat had freeboard. Roughly 8 inches more than the 310. I bought a (Davis?) clip on step that clipped around a stanchion. It was simpler and cheaper than this :
http://www.defender.com/product.jsp?path=-1|10391|109363|824303&id=38055 but this shows the idea.
Anyway, that step made using the boat possible for me and my 28" short legs. Now - with the 310, I am able to STEP down pretty easily, but I have no injury to deal with. I also have been known to sit on the gunwale (gun'l) and step ashore, again, that was on the 350, but it may be a workable, albeit less dignified approach for you.
In any case, learn to STOP your boat before getting off. This has made docking so much easier and low stress for me. Others will likely say, "well duh," but when you're stressing with wind and current against you, it doesn't always seem possible, and it isn't always 100%, but less movement means more time to get the lines tied up.
FWIW - My routine is as follows: BEFORE entering the fairway, hang the fenders. Then prepare lines so they are hanging at midpoint over the lifelines. I think it is CRITICAL to have a midship cleat and line, and that means a track mount cleat for a 310. When all lines and fenders are ready (and the lifelines are removed for access), then enter the final approach. As I enter my slip, my speed is just fast enough to maintain steerage (about 1 knot), and I am in NEUTRAL. I point the bow at about 30-45 degrees to the dock, and steer in to parallel about 2/3 in. Then I add reverse to stop the boat, and STEP ashore. CENTER line is always grabbed/tied first, so IF I am not stopped, snubbing this line does not kick the boat outward.
If conditions or position are awful, there is NOTHING wrong with backing out and trying again, or asking for help, but neighbors should only grab that center line... The good news is the 310 is probably one of the best maneuvering big boats there is in close quarters (my opinion).
Anyway, welcome to the 310 owners community! The 310 is a great boat, and I am loving mine more every time I take it out. I live in Kent, so feel free to look me up (I'm listed), if you want to talk.
Jon Freeman
"Summer Sojourn"