I'd replaced the bearings..
..on my 94-95 29.5 3 years ago ; the synptoms are the same .These bearings are actually a set of 2 Derelin (a high grade marine ;plastics') sleaves ,holding the rudder post at two separate points/levels .A smaller diameter one for the higher place and a bigger one ( and the one taking most of the stress and wear) at the lowest part of rudder stock , just at the point when it exit the hull.Don't delay this work ! The play will quickly get worse.You might try to get original replacement from Hunter in advance , if available , since these are probably custom made parts .I had to machined mine locally from the older ones as template. If you do that , made more then one set for future needs.My impresion is that they last less than metal ones , altough they have their benefits.On my occasion , I had also to rebuild their receptive place in hull ( the lower one only), a GRP work affair , better done by proffesionals.