Yes, go for it. make sure you have the MOD indeminity insurance. If it' s a club they might have it or you o pay on a pay as you go basis. Not been for a while but i think it something like £25 or thereabouts. Someone else might be abel to give a mroe accurate price but you get the idea.
Some of the radio work might be slightly different but nothing that you won't be able to handle. Have been in to Yoevilton, Lyneham and Brize Norton myself and was a good experience.
If you have a IMC rating you could try out a PAR approach at Yeovilton for a something a little differnt from the norm.